Chapter 11.2 Flashcards

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1
Q

Equation for emf induced in an AC generator coil

A

V = −dΦ/dt
= ωNBAsin(ωt)

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2
Q

Formula for maximum power dissipated in an AC generator

A

Pmax = V0I0

V0 = Maximum voltage
I0 = Maximum current

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3
Q

How do you find the average power dissipated in an AC generator?

A

Halve the maximum power

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4
Q

Equation for current in an AC generator coil

A

I = I0sin(ωt)

I0 = V0/R

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5
Q

Root mean square

A

The average value of the current or voltage in an AC circuit

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6
Q

Formula for rms of current in an AC circuit

A

I(rms) = I0/√2

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7
Q

Formula for rms of voltage in an AC circuit

A

V(rms) = V0/√2

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8
Q

Tranformer

A

A device that takes a certain ac voltage as input and delivers a different ac voltage as output

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9
Q

Sources of power loss in transformers

A

Eddy currents
Magnetic hysteresis

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10
Q

Eddy current

A

Tiny currents created in the core of a transformer because the free electrons of the core move in the presence of a magnetic field

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11
Q

Half-wave rectification

A

When the output from a diode is always positive but not constant in magnitude so that half the power is lost

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12
Q

Diode bridge rectifier

A

Used to achieve full-wave rectification

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13
Q

Full-wave rectification

A

When all the current in an AC current is rectified and all power is preserved

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