fucking magnetism Flashcards by xio lew | Brainscape

Q

what do loudspeakers do?

A

convert alternating current into sound energy

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what does the loudspeaker need to work?

A

motor effect

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what do microphones do?

A

convert sound energy into electrical energy

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what part of the microphone vibrates?

A

diaphragm

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what does a microphone use to work?

A

electromagnetic induction

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what do motors do?

A

convert electrical energy into kinetic energy

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key component is used in a motor?

A

split-ring commutator

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what does the split-ring commutator do in a motor?

A

reverses the direction of the current in the coil every half-turn so that the motor will keep on spinning in the right direction

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key effect does a motor use?

A

the motor effect

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what does a dynamo do?

A

converts kinetic energy into DC electrical energy

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key component does a dynamo contain?

A

a split-ring commutator

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key concept does a dynamo use?

A

electromagnetic induction

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what does an alternator do?

A

converts kinetic energy into AC electrical energy

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key component does an alternator use?

A

a slip ring

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

what key concept does a dynamo use?

A

electromagnetic induction

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

define electromagnetic induction

A

a potential difference is induced in a wire or coil when it cuts through magnetic field lines

Q

how can you change the size of the induced potential difference when using electromagnetic induction?

A

-faster motion
-stronger magnetic field
-more turns in the coil