ARTIFICIAL INTELLIGENCE QUIZ

An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

VL < VR

VL > VR

VL = VR

VR ≥ VL

TRUE ANSWER : ?
YOUR ANSWER : ?

A 320 H coil is in series with a 3.3 k resistor. How long does it take for current to build up to its full value?

0.48 μs

0.48 s

0.48 ms

48 s

TRUE ANSWER : ?
YOUR ANSWER : ?

The inductance of an iron-core coil decreases if

None of these

the number of turns is decreased

the length of the coil decreases

the iron core is removed

TRUE ANSWER : ?
YOUR ANSWER : ?

A 240 H inductor is equivalent to a

0.240 mH inductor

0.000240 mH inductor

240 H inductor

240 mH inductor

TRUE ANSWER : ?
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A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is

9.9 mH or greater than 5 mH

less than 0.6 mH

greater than 5 mH

9.9 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

Three 15 mH inductors are in series. The total inductance is

45 mH

30 mH

15 mH

5 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field

doubles

is quartered

quadruples

does not change

TRUE ANSWER : ?
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The winding resistance of a coil can be increased by

increasing the number of turns

using a thinner wire

changing the core material

increasing the number of turns or using thinner wire

TRUE ANSWER : ?
YOUR ANSWER : ?

A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current

does not change

is decreased

momentarily goes to zero

is increased

TRUE ANSWER : ?
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The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is

18 mV

1.25 mV

180 mV

1.8 mV

TRUE ANSWER : ?
YOUR ANSWER : ?

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