判断题 The iron core of an inductor converts some electric energy into heat energy.

A、正确

B、错误

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相关试题

单选题 What is the main difference between AC and DC?

A、AC flows faster than DC

B、AC periodically reverses direction; DC flows in one direction

C、AC has higher voltage than DC

D、DC can be transformed easily

单选题 How many electrical degrees are in one cycle?

A、90°

B、180°

C、360°

D、720°

单选题 Determine the rms current when Ip = 8 A

A、5.656A

B、6.566A

C、6.666A

D、5.555A

单选题 How rapidly a waveform is produced is determined by the of the ( ) waveform.

A、frequency

B、cycle

C、period

D、current

单选题 The peak-to-peak value of a sine wave is ______ times its peak value.

A、0.5

B、1

C、2

D、3

单选题 Which factor does NOT affect induced voltage in a conductor?

A、Speed of the conductor

B、Magnetic flux density

C、Angle of crossing flux

D、Conductor resistance

单选题 Which waveform is most commonly used for AC?

A、Square wave

B、Sawtooth wave

C、Sine wave

D、Triangular wave

单选题 What is the base unit for frequency?

A、Volt (V)

B、Hertz (Hz)

C、Ampere (A)

D、Ohm (Ω)