Free Printable Inductors and Capacitors in DC

1.

A capacitor is a device

a)

that has only two plates

b)

that can store an electric charge

c)

which is similar to an inductor

d)

with a metal-dielectric

2.

The unit of capacitance is

a)

the joule

b)

the volt

c)

the Henry

d)

the Farad

3.

The capacitance of a capacitor

a)

is proportional to the distance between the plates

b)

is proportional to the cross-sectional area of the plates

c)

depends on the permeability of the dielectric

d)

all of the above

4.

For two capacitors in series, the total capacitance is

a)

$C_1=\frac{C_1+C_2}{C_1\times C_2}$

b)

$C_T=C_1\times C_2$

c)

$C_T=C_1\times C_2$

d)

$C_1=\frac{C_1\times C_2}{C_1+C_2}$

5.

Which of the following statements is TRUE?

a)

electrolytic capacitors are polarized

b)

paper capacitors are polarized

c)

electrolytic capacitors have no dielectric

d)

Mica capacitors usually have large capacitances

6.

The equivalent capacitance of the figure is

a)

$3\mu F$

b)

$8\mu F$

c)

$48\mu F$

d)

$16\mu F$

7.

An air capacitor is often used:

a)

in filter circuits

b)

as a substitute for paper capacitors

c)

when a polarized capacitor is required

d)

in tuning circuits

8.

Capacitors store energy in a (an)__________.

a)

metal dielectric

b)

dry cell

c)

magnetic field

d)

electric field

9.

...... is just a coil of wire.

a)

resistor

b)

inductor

c)

capacitor

d)

transistor

10.

Which electronic components can be polarized and non-polarized?

a)

resistors

b)

inductors

c)

capacitors

d)

transformers

11.

Name this electrical component

a)

Ceramic Disc Capacitor

b)

Fixed Resistor

c)

Potentiometer

d)

Electrolytic Capacitor

12.

Name this electrical component

a)

Electrolytic Capacitor

b)

Fixed Resistor

c)

Ceramic Disc Capacitor

d)

Diode

13.

What is in the picture?

a)

Capacitor

b)

Resistor

c)

Diode

d)

Inductor

14.

What is in the picture?

a)

Capacitor

b)

Resistor

c)

Diode

d)

Inductor

15.

The rise of fall of current through an inductor is said to be

a)

exponential

b)

sinusoidal

c)

constant

d)

none of the above

16.

Inductance is the property of a coil that

a)

opposes current

b)

causes resistance

c)

opposes any change in current

d)

depends on frequency

17.

The self-inductance of a coil is given as

a)

$L=\frac{\phi}{NI}$

b)

$L=\frac{N\phi}{I}$

c)

$L=\frac{NI}{\phi}$

d)

$L=\frac{N\phi}{I^2}$

18.

The time constant of an LR circuit with L = 250 mH and R=20 ohms is

a)

12.5ms

b)

125ms

c)

1.25ms

d)

5s

19.

When 2.5A is flowing through a 15mH coil, the energy stored is

a)

$46.9\ mJ$

b)

$18.75\ mJ$

c)

$37.5\ mJ$

d)

$166.7\ mJ$

20.

If an iron core is inserted in a coil, the coil's inductances will

a)

stay the same

b)

increase

c)

decrease

d)

disappear

21.

If two inductors of equal value are connected in parallel, what is their total inductance?

a)

The same value as either inductor

b)

Twice the value of one inductor

c)

Half the value of one inductor

d)

It depends on the type of inductor

Inductors and Capacitors in DC

Total questions: 21

Worksheet time: 11mins

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