Edexcel P1 Energy transfers Questions with 100% Correct Answers | Latest Update 2024

Edexcel P1 Energy transfers Name 4 stores of energy gravitational, Chemical, Elastic and nuclear Name 5 other forms of energy (than stores) Heat, Light, Sound, Electrical, Kinetic What is kinetic energy? Energy for moving energy What can you do to increase Gravitational Potential Energy of an object? Place the object higher up What is the input energy in a torch? Chemical energy What is the output (useful) energy in a torch? Light energy What is the output (wasted) energy in a torch? Heat energy If the input energy is 100J and the useful energy is 80J in a torch, how much has been wasted? 100- 80=20J If the input energy is 1000J and the wasted energy is 600J in a car engine, how much has been useful? 1000-600=400J If a radio gives out 70J of sound and wastes 10J in heat, how much energy was there at the start? 70+10=80J What is the relationship between input, output and wasted energy? the input energy is equal to the combined useful and wasted energy; input = useful+wasted If the input energy is 100J and the useful energy is 80J in a torch, what is the efficiency? 80J/100J *100=80 What are efficiency ratings? Letters that allow you to compare the efficiency of electrical objects Which is the better efficiency rating A or E? A Apart from the power rating, what would you need to know to compare two types of light bulbs? How long you use the light bulb for Which colour loses heat fastest: black or white? Black A swimming pool radiates 1200W of energy. How much energy must you heat it up with to keep the temperature the same? 1200W What happens if an object receives more heat than it radiates? The object heats up What happens if an object radiates more heat than it receives? The object cools down What does "an object radiates heat" mean? When an object loses heat energy The students use the electric motor to lift a weight. The current in the motor is 0.5 A. The potential difference (voltage) across the motor is 6 V. Calculate the input power to the motor. State the unit. Calculate the efficiency o