Deck 8 = Energy Flashcards Preview

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Flashcards in Deck 8 = Energy Deck (15):
1

The Law of electromagnetic induction?

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

2

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

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

3

Faraday's law of electromagnetic induction?

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

4

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

- Moving the wire in the opposite direction.
- Turning the magnet round so that the field direction is reversed.

5

the induced electromagnetic field can be increased?

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

6

Wind ->

-> Kinetic -> electrical

7

Ways in which the energy of water can be harnessed?

Hydroelectric, tidal, wave, dams.

8

Solar Cells ->

-> light -> electric

9

Solar water heaters ->

-> heat -> kinetic -> electrical

10

fossil fuels ->

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

11

nuclear ->

-> heat -> kinetic -> electric

12

hydroelectric ->

-> gravitational potential -> kinetic -> electrical

13

tidal ->

kinetic -> electrical

14

dams ->

gravitational potential -> kinetic -> electrical

15

What is meant by energy is reserved?

Total energy always has the same value.