Science - Physics - Energy Transfer Flashcards
State the original energy form and what it is transformed into when dropping a ball.
Gravitational potential
To
Kinetic energy
State the original energy form and what it is transformed into when turning on a kettle.
Electrical energy
To
Thermal
State the original energy form and what it is transformed into when connecting a battery to a circuit.
Chemical energy
To
Electrical energy
State the original energy form and what it is transformed into when switching on a light bulb.
Electrical energy
To
Thermal and light energy
How is energy measured?
In Joules (J) or kilo joules (kJ)
What is the formula for Efficiency?
Efficiency = Energy output/ energy input x 100
What is wasted energy?
When energy is transformed, some of the energy is transformed into unwanted forms such as heat energy. Any unwanted form is considered ‘wasted’ energy.
What is the formula to work out wasted energy?
Total energy input - useful energy output = wasted energy
