INDUCTORS QUIZ

A 240 H inductor is equivalent to a

0.000240 mH inductor

240 mH inductor

240 H inductor

0.240 mH inductor

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 ms

48 s

0.48 s

0.48 μs

TRUE ANSWER : ?
YOUR ANSWER : ?

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

9.9 mH

less than 0.6 mH

9.9 mH or greater than 5 mH

greater than 5 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

An inductance of 0.08 μH is larger than

0.000000008 H

0.000008 H

0.0000008 H

0.00008 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

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

5 mH

45 mH

15 mH

30 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

An inductance of 0.43 mH is smaller than

430 μH

43 μH

0.05 H

0.00043 H

TRUE ANSWER : ?
YOUR ANSWER : ?

An inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is

0 V

4 V

12 V

6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

When the current through an inductor decreases, the amount of energy stored in the electromagnetic field

doubles

decreases

remains the same

increases

TRUE ANSWER : ?
YOUR ANSWER : ?

The winding resistance of a coil can be increased by

increasing the number of turns

changing the core material

increasing the number of turns or using thinner wire

using a thinner wire

TRUE ANSWER : ?
YOUR ANSWER : ?

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

VR ≥ VL

VL < VR

TRUE ANSWER : ?
YOUR ANSWER : ?

↑