Deck 8 = Energy Flashcards

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1
Q

The Law of electromagnetic induction?

A

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

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2
Q

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

A
  • Moving the wire.
  • Using a stronger magnet.
  • Increasing the length of wire.
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3
Q

Faraday’s law of electromagnetic induction?

A

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

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4
Q

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

A
  • Moving the wire in the opposite direction.

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

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5
Q

the induced electromagnetic field can be increased?

A
  • Moving the magnet faster.
  • Using a stronger magnet.
  • Increase the number of turns in the coil.
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6
Q

Wind ->

A

-> Kinetic -> electrical

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7
Q

Ways in which the energy of water can be harnessed?

A

Hydroelectric, tidal, wave, dams.

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8
Q

Solar Cells ->

A

-> light -> electric

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9
Q

Solar water heaters ->

A

-> heat -> kinetic -> electrical

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10
Q

fossil fuels ->

A

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

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11
Q

nuclear ->

A

-> heat -> kinetic -> electric

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12
Q

hydroelectric ->

A

-> gravitational potential -> kinetic -> electrical

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13
Q

tidal ->

A

kinetic -> electrical

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14
Q

dams ->

A

gravitational potential -> kinetic -> electrical

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15
Q

What is meant by energy is reserved?

A

Total energy always has the same value.

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