electronics testing with a multimeter

8/20/2019 Electronics Testing With a Multimeter

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1.

Of the following common metals, which has the highest conductivity rating?

~ i l v e r

B.

Copper

C.

Gold

D.

Aluminum

Use

this illustration to answer the question below.

2. Look at the circuit shown in the figure above. With switch S

1

closed, you re making voltage

measurements with your meter. Assume that each of the four resistors has a resistance value of I 00 kfl.

You measure 3.6 V across resistor Rl 1.2 V across resistor R

2

,

1.2 V across resistor R

3

,

and 2.4 V across

resistor R

4

.

What is the battery voltage

in

the circuit?

A.6V

B.4V

C.2V

D.lOV

Use


D

R

V

8

R2

E

c



3. In the circuit shown in the figure above, where would you connect your meter s test probes to measure

the full battery voltage?

A To points D and E, or to points Band E

B. To points A and Conly

C. To points D and E, or to points A and C

D. To points B and E only

Use


4. Assuming that each of the resistors in the circuit shown in the figure above has a resistance value of 20

k l

and switch 1

is

closed, which resistor will dissipate the most power?

A.R

3

B R

4

C.R

2

D. R

1

Use


6V

=

M4

. Look at the circuit shown in the figure above. The circuit contains a 6 V battery and three resistors. Fo

meters are being used to make measurements in the circuit. Meters M

1

, M

2

, and M

3

are being used to

easure current at different points in the circuit. Meter M

4

is

being used to measure voltage at another

in the circuit. With

s

1

closed, M

1

has a current reading of0.04A. What will be the total resistance in

his circuit?

3oo

n

son

c 1oo

n

1so

n



Use


Ar<

c

~

Rl

0

R

V =

B

E

6. Look at the circuit shown in the figure above. Switch S

1

is open as shown, and R

1

and R

2

each have a

value of

100 kfl

If you connect your meter s test probes to points A and B in the circuit, what voltage

would you measure?

A 6V

B OV

C 9V

D. 3 V

Use this illustration to answer the question below.

. Again, assume that each

of

the resistors in the circuit shown in the figure above has a resistance value o

100 kfl With switch S open as shown, you measure the voltage across each resistor with your meter.

hich of the following statements is correct?

Resistors R

4

and R

1

will

dissipate equal

amounts

of power.

. Resistors R

1

, R

2

, and R

3

will dissipate equal amounts of power.

C.

Resistor R

1

will dissipate

the

most power.

3

will

dissipate the most power.

y precaution must be observed when measuring resistance in an electronic circuit?

red test lead

must

be at the most positive point

in

the

circuit.

The black test lead must be connected to the chassis ground.

C.

The meter s

highest resistance range setting should

be

used until

the

actual value

is

determined.

power to the component under test must be disconnected.

se this illustration to answer the question below.



0

A

l

6V :

B

e

c

9. Look at the circuit illustrated in the figure above. Assume that the values ofR

n d ~ are equal.

If

you

connect your meter s test probes to points A and B in the circuit, which

of

the following voltages would

you measure?

OV

B 9V

C 3V

6V

se this illustrat ion to answer

the

question below.

6V =

M4

10. What will be the total power dissipated in the circuit shown in the figure above

ifMl

has a current

of

0.04

A.?

W

150W

se this illustra tion to

answer

the question below.

Ar<

c

W

l

D

R

V :

B

e

1. For the circuit shown in the figure above, the correct procedure for measuring the resistance value of

is

to



A.

connect the multimeter between points C and D and measure the resistance with switch S

1

open.

B. connect the multimeter between points D and A and measure the resistance with switch S

1

open.

C. connect the multimeter between points C and D and measure the resistance with switch S

1

closed.

D.

connect the

multimeter between points D

and

A and

measure the

resistance with switch S

1

closed.

Use this illustration to

answer the

question below.

0

A

Rl

6V =

8

E

c

the circuit shown in the figure below suppose that the value of R

1

is 500 kfl. To obtain a

of V between points B and C in the circuit the value o ~ would have to be

10 000 kfl.

1 000 kfl.

answer

the question below.

A

0

Rl

V

=

8

R

E

c

the circuit shown in the figure above suppose that the value of R

1

is 100 kfl and the value

of

R

2

i

kfl. At which of the following locations in the circuit would you measure the highest voltage with you

Between points B and C

points B and E

Between

points A and B

points A and C

answer

the

question below.



14. Assuming that each of the resistors in the circuit shown in the figure above has a resistance value of

100

kfl

what will be the total resistance

of

the circuit with switch

s

1

closed?

167

kfl

400kfl

c 100 kfl

280kfl

answer the question below.

6V

:::::::::

M4

Look at the circuit shown in the figure above. With switch

s

1

closed, meter M

4

reads

4

V across R

3

.

1

and R

2

?

The meter would read 4 V across R

1

and 4 V across R

2

.

1

and R

2

.

R

1

and 2 V across R

2

.

1

and R

2

.

answer the

question below.

Ar<

c

~

Rl

R

V :

8

E

You re using your meter to make voltage measurements in the circuit shown in the figure above. Your



meter is connected between points A and C, and you re getting a reading of 6 on the display. What can

you conclude from this reading?

A. Resistor R

2

has a resistance value that s twice the

value

of either R

1

.

B.

Resistors

R

1

and

R

2

have

equal

resistance

values.

C. Switch S

1

is closed.

D. Switch S

1

is open.

Use this illustration to answer the question below.

6V

M

s

closed and the resistance value of R

an

equal, meter M

1

has a current reading

of

0.04

A.

What will be the current readings on meter M

2

and

3

?

Meter M

2

will read 0.02

A,

and meter M

3

will read

0.02 A.

Meter M

2

and meter M

3

will both

read

0.1

A

Meter M

2

will read 0.2 A,

and

meter M

3

will read 0.4 A

Meter M

2

and meter M

3

will both read

0.04

A


6V:::::::::

M

3

displays a higher current reading than

of the following could be the cause of this condition?

Switch S

1

is open.

Resistor R

3

is

open.



C. Resistor R

1

is

shorted.

D Resistor R

2

is

shorted.

Use this illustration to answer the question below

.r<.

c

W

R

R

V =

E

19 In the circuit shown in the figure above where R

1

and R

2

have equal resistance values, when switch S

is closed, what voltage would you measure across with your meter?

6V

.ov

0 Imagine that you've properly connected your multimeter into an operating circuit, and the meter's

unction/range switch is set to read DC voltage in the 20 V range. The meter displays a 1 in the most

ignificant digit position. This indicates that

function/range switch should be set to the next lowest range

the

power to the circuit

is

turned off

C

the

voltage

at

the

point under test

is

greater than

20

V

the

meter measured a voltage of 1 V at the point under test

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electronics testing with a multimeter

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