Deck 8 = Energy

Question 1

The Law of electromagnetic induction?

Answer 1

A current carrying conductor will experience a force when moving through a magnetic field.

Question 2

How can the electromagnetic field (and current) be increased?

Answer 2

• Moving the wire.
• Using a stronger magnet.
• Increasing the length of wire.

Question 3

Faraday’s law of electromagnetic induction?

Answer 3

The EMF induced in a conductor is proportional to the rate at which magnetic filed lines are cut by the conductor.

Question 4

How can you reverse the direction of the induced EMF and current?

Answer 4

• Moving the wire in the opposite direction.

- Turning the magnet round so that the field direction is reversed.

Question 5

the induced electromagnetic field can be increased?

Answer 5

• Moving the magnet faster.
• Using a stronger magnet.
• Increase the number of turns in the coil.

Question 6

Wind ->

Answer 6

-> Kinetic -> electrical

Question 7

Ways in which the energy of water can be harnessed?

Answer 7

Hydroelectric, tidal, wave, dams.

Question 8

Solar Cells ->

Answer 8

-> light -> electric

Question 9

Solar water heaters ->

Answer 9

-> heat -> kinetic -> electrical

Question 10

fossil fuels ->

Answer 10

-> chemical -> heat -> kinetic -> electrical

Question 11

nuclear ->

Answer 11

-> heat -> kinetic -> electric

Question 12

hydroelectric ->

Answer 12

-> gravitational potential -> kinetic -> electrical

Question 13

tidal ->

Answer 13

kinetic -> electrical

Question 14

dams ->

Answer 14

gravitational potential -> kinetic -> electrical

Question 15

What is meant by energy is reserved?

Answer 15

Total energy always has the same value.