NCEA Level 1 Energy Practice Test

These questions are part of the practice quiz. Start practicing

• What happens to the kinetic energy after impact (ignore air resistance)?
• What is the unit for force (weight) in Newtons?
• Why is energy conservation important in analyzing physical systems, and give an example involving roller coasters.
• A block slides down a frictionless ramp from height h to the ground. How is energy conserved and what is the energy at the bottom?
• A car decelerates from 20 m/s to 0 m/s with mass 900 kg. How much kinetic energy is lost?
• Which option correctly identifies the SI unit symbol for time?
• Name the three basic modes of heat transfer.
• The symbol W is used to denote which physical quantity?
• How is wind energy turned into electricity in a wind turbine?
• In a simple circuit with a battery and a bulb, what energy forms are involved as the bulb lights up?
• Resistance is defined as
• Why are coal resources considered non-renewable?
• Which of the following is a unit for energy or work?
• What is the difference between renewable and non-renewable energy sources?
• Which of the following is an example of energy conservation in daily life?
• What is specific heat capacity?
• Which unit is used to measure voltage?
• In the same circuit, what is the voltage across the 200 Ω resistor?
• In the gravitational potential energy formula GPE = m g h, what does g represent?
• A heat pump uses 120 kJ of electrical energy to move heat and delivers 200 kJ of heat to a room. What is the coefficient of performance (COP) of the heat pump?
• In a circuit, what does voltage do in series vs parallel?
• Which statement describes a disadvantage of solar energy?
• If a 2 kg mass moves at 3 m/s, what is its kinetic energy?
• Which statement describes an insulator's effect on heat transfer?
• Which formula represents electrical power?
• A cyclist increases speed from 0 to 6 m/s in 2 s. What is the average acceleration?
• Which statement defines work in physics?
• Which statement best describes a joule?
• The energy content of a chocolate bar is 1000 kJ. If you eat half, how much energy do you consume?
• Define power and give its unit. If a solar panel delivers 150 W of power for 3 hours, how much energy does it produce?
• What is the unit for current?
• What is the symbol commonly used to represent time in physics equations?
• Compare heat transfer by conduction in a metal rod vs a wooden rod of the same dimensions when one end is heated.
• Which equation expresses latent heat for a phase change?
• A 3.0 N force moves an object 2.0 m in the direction of the force. How much work is done?
• A machine uses 2000 kJ of energy input and produces 500 kJ of useful energy. What is the efficiency?
• Which heat transfer method occurs through electromagnetic waves and can operate in a vacuum?
• A saucepan contains 0.80 kg of water. It is heated from 25°C to 75°C. With c = 4184 J/kg°C, how much energy is added?
• What unit is commonly used on nutrition labels to express energy content?
• The symbol commonly used to denote work in physics equations is?
• When an object falls through air and reaches terminal velocity, what happens to the energy transfer rate and why does it stop increasing?
• Insulation reduces heat transfer by trapping air, which helps reduce conduction and convection. Which description best captures this mechanism?
• How does a microwave oven heat food differently from a conventional oven?
• In a series circuit, what is true about current through components?
• Which statement about time is true?
• A rugby ball of mass 0.50 kg is kicked to a speed of 12 m/s. What is its kinetic energy?
• In a parallel circuit with resistors 2 Ω, 4 Ω, and 6 Ω connected to a 9 V supply, which resistor carries the greatest current?
• Explain how energy efficiency in home appliances affects carbon emissions.
• What is COP and why is it not the same as efficiency?
• Which heat transfer occurs by direct contact between materials?
• What is the unit of measurement for electrical current?
• What is the unit of energy in the metric system and its common symbol?
• What is energy transferred due to temperature difference called?
• In electrical notation, P stands for which quantity?
• What is the SI unit of energy?
• Gravitational potential energy with mass 5 kg, gravity 10 m/s^2, height 2 m is?
• What energy transformation occurs when a stretched elastic band is released?
• Describe the role of a turbine and generator in a hydroelectric power plant.
• Which statement best explains the law of conservation of energy?
• Which expression represents efficiency?
• Define efficiency of a device in terms of energy input and useful output energy; show calculation example with numbers.
• Renewable energy sources are energy sources that can be replenished quickly.
• What is the unit of measurement for electrical power?
• Which quantity is measured in Ohms?
• Voltage is defined as
• Which statement describes solar energy as renewable on a broad scale?
• Which equation represents the work done by a constant force?
• Which statement about energy use is true when two bulbs, one 60 W and one 100 W, are used for the same amount of time?
• Explain how a wind turbine uses wind energy to generate electricity, mentioning two energy conversion steps.
• What is the formula for weight?
• In a bouncing ball, what happens to kinetic energy during impact?
• A 0.25 kg metal spoon has c = 500 J/kg°C. If it is heated by 20°C, how much energy is absorbed?
• Name a practical way to increase energy efficiency in a home heating system.
• What is the formula for kinetic energy?
• In photosynthesis, what are the inputs and outputs in terms of energy and matter?
• Which form of energy is stored in a stretched elastic band?
• A light bulb converts electrical energy into what forms?
• A 2.0 kg block is lifted 5.0 m. What is the work done?
• Why is light energy from the Sun considered a renewable resource, even though sunlight availability varies by location and time?
• How does a solar cell power a calculator?
• Which expression represents the energy change when heating a mass m by a temperature rise ΔT with specific heat capacity c?
• A 1.0 kg ball falls from height 2.0 m. What is its kinetic energy just before impact?
• Distinguish between energy efficiency and energy conservation.
• A refrigerator removes 250 J of heat from its interior in 60 seconds using input energy of 600 J. What is its efficiency?
• Which term describes something that has mass and occupies space?
• Which statement about energy conservation is true?
• Which statement defines efficiency as used in energy transfer calculations?
• Which energy form is stored in the hot water inside a kettle before it boils?
• Which statement best defines current?
• Which description best defines a series circuit?
• What is the unit for voltage?
• An LED consumes 5 J of electrical energy. If its efficiency is 20% for light, how much light energy is produced?
• Which equation correctly expresses electrical energy transferred by a device with constant power over time?
• A system contains 500 J of energy. 150 J is lost as heat to surroundings. What is the remaining energy and where did the energy go?
• Which is a major limitation of solar photovoltaic energy?
• What energy form do we feel as warmth from sunlight?
• Which statement best describes a conductor?
• A hot cup of tea is placed in a fridge at 4°C. In which direction does heat flow?
• Which quantity is measured in joules per second?
• What is the unit of specific heat capacity?
• Which statement about energy conservation in a frictionless system is true?
• In a series circuit with two resistors 5 Ω and 10 Ω connected to a 12 V supply, what is the current? And what is voltage across each resistor?
• Which sentence correctly defines the specific heat capacity?
• Which property helps keep a house warm by reducing heat transfer?
• How is work defined in physics? Provide a basic formula.
• In everyday energy usage, what describes the effect of higher efficiency on energy consumption for the same output?
• A device converts 90% of electrical energy into useful energy (light). What is its efficiency?
• How does insulation thickness affect energy losses in a house, and what principle explains it?
• An object of mass 0.50 kg is released from rest at a height of 4.0 m. What is its kinetic energy just before it hits the ground (ignore air resistance)?
• Which of the following correctly matches a symbol with its meaning?
• In the weight formula F = mg, which value is used for g?
• What is the unit for energy?
• Which statement shows the percentage of daily energy used for activities when basal energy is 2500 kJ and total energy is 3000 kJ?
• Latent heat is defined as
• What energy transformation occurs in photosynthesis?
• The joule is the SI unit for which quantity?
• Temperature is defined as?
• A force of 2 newtons acts through 3 meters in the direction of the force. What is the work done?
• If a lamp converts 90% of electrical energy into useful energy, how much energy is wasted as heat when 200 J is supplied?
• Which statement describes a parallel circuit?
• A 60 W light bulb runs for 2 hours. How many joules of energy does it use?
• The symbol V is used to represent which quantity in electricity?
• What does conservation of energy mean in a closed system?
• A magnet and coil generator produce electricity. Identify the energy transformations that occur.
• What energy is required to melt 0.20 kg of ice at 0°C?
• In a falling object that reaches terminal velocity, what is the net force on the object?
• Which description defines convection?
• What is the unit of electrical resistance?
• What units are used for specific heat capacity?
• A student measures the temperature change of 0.5 kg of water from 20°C to 40°C. If the specific heat capacity of water is 4180 J/kg°C, how much energy is transferred as heat?
• Compute work done when a 5 N force acts over 3 m.
• What is the difference between a conductor and an insulator? Give an example of each in an electrical context.
• What is the difference between heat and temperature?
• Which formula correctly calculates power (mechanics)?
• Which formula describes gravitational potential energy, and what is the GPE of a 2 kg mass raised 5 m (g ≈ 9.8 m/s^2)?
• Which is the unit of force?
• If a device has energy efficiency of 25%, what fraction of input energy is wasted, and how could efficiency be improved?
• What is the unit for time?
• Which quantity is measured in newtons?
• Which statement describes how energy is transferred in a resistive circuit?
• A tennis ball of mass 0.12 kg is raised 2 m. What is its gravitational potential energy relative to the ground?
• A car travels 250 m in 10 s. What is its average speed?
• What energy transformation occurs when a kettle heats water, and what form of energy is mainly produced by the heating element?
• When you shake a bottle of water, energy you put in is converted primarily into what?
• A 2.0 kg object is lifted to a height of 5.0 m. What is its gravitational potential energy relative to the ground?
• Power is defined as
• If voltage is fixed and resistance increases, what happens to current?
• What is the definition of specific heat capacity?
• Why does a greenhouse trap heat?
• Define work in physics.
• What is the value of the equivalent resistance for three resistors of 2 Ω, 4 Ω, and 6 Ω in parallel?
• A furnace releases 3500 kJ of energy, with 900 kJ useful. What is the efficiency?
• If a ball of mass 1 kg is released from a height of 4 m, its kinetic energy just before impact is closest to which value?
• Which statement correctly defines latent heat of fusion?
• A light bulb emits 60 lumens and consumes 60 watts. What is its luminous efficacy?
• Which quantity is measured in seconds in SI units?
• Which statement correctly differentiates speed and velocity and identifies which describes energy transfer rate?
• Which of the following is a unit used to measure time?
• In a frictionless roller coaster, what happens to energy as it moves from top to bottom?
• What is the unit for temperature?
• Two resistors, 100 Ω and 200 Ω, are connected in series to a 9 V battery. What is the total resistance and the current?
• How do solar panels convert light energy into electrical energy, and what is a limitation?
• A light bulb is rated at 60 W. If it runs for 2 hours, how much energy does it use in kJ?
• Insulation reduces heat transfer in a house. Which material is commonly used as insulation?
• A hot metal rod transfers heat to its cooler end. What form of heat transfer is this?
• In a hydroelectric dam, the energy delivered to the electrical grid is in which form?
• What does the symbol L stand for in physics?
• In a parallel circuit, does the voltage across each resistor equal the supply voltage?
• Which statement describes radiation?
• Which statement best describes an insulator?
• A 1000 W kettle is used for 2 minutes. What is the energy consumed in kilojoules?
• Which device heats food primarily by microwave radiation?
• Which of the following is the SI base unit for time?
• Which expression gives the energy change when heating a mass with specific heat capacity?
• Which is the correct unit for speed?
• What is meant by useful output energy in an efficiency calculation?
• Which statement correctly defines energy efficiency and energy conservation?
• The electrical energy difference between two points in a circuit is called
• If two identical devices with the same power rating are used for the same time, but one is twice as efficient, what is the energy input difference?
• A solar panel delivering 50 W for 6 hours produces how much energy in joules?
• In a parallel circuit, the voltage across each branch is what?
• Which statement best describes the difference between work and heat?
• What is the unit for distance?
• In daily energy budgeting, if 500 kJ is used for activities and total daily energy is 3000 kJ, how much energy goes to basal metabolism?
• Which expression gives kinetic energy?
• In the equation F = mg, what does g represent?
• In a hydroelectric dam, potential energy of water is first converted into which form of energy as it moves toward the turbine?
• In the equation F = mg, what does m represent?
• In a parallel circuit with resistors of different values, do currents flow through each branch equally?
• A saucepan contains 0.50 kg of water heated from 20°C to 60°C. With c = 4184 J/kg°C, how much energy is added?
• Conduction is defined as:
• What role does energy play in living organisms' energy budgets, and give an example from humans or animals.
• Which statement correctly defines latent heat of fusion?
• A 1.5 kg object is lifted 3.0 m. What is the gravitational potential energy gained?
• Which statement correctly identifies the phase change involved in latent heat of fusion?
• Regarding current, which statement is true for series vs parallel circuits?
• Which statement about conservation of energy is true?
• A 60 W heater runs for 1 hour. How much energy is used in kJ?
• What is the difference between heat and temperature?
• In the same series circuit, what is the voltage across the 100 Ω resistor?
• If 1.0 kg of water is heated from 20°C to 60°C, how much energy is added? Use c = 4.18 kJ/kg°C.
• A lamp converts 90% of electrical energy into light. If 200 J of electrical energy is supplied, how much light energy is produced?
• If you want to keep a house warm, do you want high or low thermal conductivity materials for insulation?
• Which statement about latent heat is true?
• What does the symbol P stand for in energy contexts?
• Luminous efficacy describes the efficiency of converting electrical power into visible light. Which statement is true?
• Which formula represents the latent heat for a substance changing state?
• A 5.0 kg block is lifted 3.0 m. What is the work done?
• Which energy form provides the initial energy to power a wind turbine?
• A person uses 2500 kJ of energy per day for basal metabolism. If total daily energy is 3000 kJ, how much energy is used for activities?
• Which mode of heat transfer does not require a medium and can occur in a vacuum?
• The symbol I denotes which electrical quantity?
• If a material has high thermal conductivity, heat transfer through it is...
• How much energy is required to heat a 0.20 kg ice cube from -5°C to 0°C and then melt it?
• Give two examples of renewable energy resources that can generate electricity.
• Which type of energy is stored in a battery?
• A car of mass 1200 kg moves at 20 m/s. What is its kinetic energy?
• Which of the following is NOT a unit used to measure time?
• What energy form is stored in glucose produced by photosynthesis?
• Latent heat of vaporization refers to the heat exchanged during which phase change?
• In a circuit with a 12 V supply and two resistors in series, 3 Ω and 9 Ω, what is the current and voltage drop across each resistor?
• Which sentence defines heat in a basic sense?
• Which mode of heat transfer involves fluids moving heat in loops?
• A 0.3 kg marble is dropped from 2 m. If air resistance is negligible, what speed does it reach just before impact? Use v^2 = 2 g h.
• Which expression is Ohm's law?
• The symbol R represents which electrical quantity?
• Work calculation: If F = 4 N and d = 2 m, what is the work W?
• What does the symbol T represent in physics?
• Energy required to heat 250 g iron from 20°C to 60°C with c = 450 J/kg°C?
• What happens to total energy in a falling object ignoring air resistance?
• Which symbol represents latent heat?
• Which quantity is measured in joules?
• What is the unit of heat capacity?
• When light passes from air into water (n1 = 1.00, n2 = 1.33), what happens to speed and bending?
• Define power in energy terms.
• A car travels 60 m in 3 s. What is its average speed?
• Which set of equations correctly describes Ohm's law and related power in a circuit?
• A 60 W bulb runs for 1 hour. How much energy does it use?
• Which quantity uses joules per second as its unit?
• Latent heat of vaporization refers to the heat exchanged when a substance changes state between which phases?