NS Gr 7 T 10

what type of energy do electrical systems need in order for them to perform their task?

• electrical energy

• thermal energy

• potential energy

• kinetic energy

An electrical circuit has components that work together. Which component(s) is/are missing from this list?

cell, switch, light bulb, .....

• wires

• battery

• buzzer

• all of the above

electrical energy can be transferred into different forms of energy. What type(s) of energy can electrical energy be changed into in a light bulb?

• thermal energy

• light energy

• kinetic energy

• all of the above

when we consider energy transfers in an electrical system, which part of the system do we concentrate most on?

• The charges carrying energy

• the particles of the wires

• the chemicals in the cells

• the light energy in the light bulb

The charges carry electrical energy. What type of energy do these charges have when when they are in the cell, waiting for the circuit to be switched on?

• kinetic energy

• thermal energy

• potential energy

• movement energy

When the circuit is connected, the charges carry the electrical energy through the circuit. What type of energy do they have now?

• kinetic energy

• thermal energy

• potential energy

• light energy

what is kinetic energy?

• stored energy

• magnetic energy

• gravitational energy

• movement energy

You can always see the object move in kinetic energy

• true

• false

describe the relationship between the potential and kinetic energy in a golf club which is swung back and ready to hit the ball.

• high Pe, high Ke

• High Pe, low Ke

• low Pe, high Ke

• high Pe, no Ke

describe the relationship between the potential and kinetic energy in an athlete running on the race track.

• No pe, high Ke

• high Pe, low Ke

• low Pe, high Ke

• high Pe, no Ke