1.
Which of the following is likely to have the largest resistance ?
A
a copper wire of length 1 m and diameter 3 mm
B
voltmeter of range 10 V
C
moving coil galvanometer
D
ammeter of range 1 A
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21 practice sets · Page 1 of 2
Which of the following is likely to have the largest resistance ?
a copper wire of length 1 m and diameter 3 mm
voltmeter of range 10 V
moving coil galvanometer
ammeter of range 1 A
When an ammeter is inserted in the circuit, the circuit current will ...............
none of the above
increase
decrease
remain the same
What is the total resistance of a voltmeter on the 10 V range when the meter movement is rated for 50 µA of full-scale current ?
none of the above
10 kohms
20 kohms
200 kohms
Two multimeters A and B have sensitivities of 10 kohms/V and 30 kohms/V respectively. Then ...............
none of the above
multimeter A is more sensitive
multimeter B is more sensitive
both are equally sensitive
To send 10 percent of the main current through a moving coil galvanometer of resistance 99 ohms, the shunt required is ...............
9 ohm
11 ohm
9.9 ohm
100 ohm
The sensitivity of a voltmeter which uses a 100 micro Amperes meter movement is ...............
data insufficient
1 kohm/V
10 kohm/V
5 kohm/V
The sensitivity of a multimeter is given in ...........
ohm
amperes
kohm/V
none of the above
The resistance of an ideal voltmeter is .........
low
infinite
zero
high
The input resistance of a VTVM is about ............
1000 ohm
10 kohm
20 kohm
10 Mohm
An ideal ammeter has ............... resistance
low
infinite
zero
high
An ammeter should have ............... resistance
infinite
very large
very low
none of the above
An ammeter is connected in ............... with the circuit element whose current we wish to measure
series
parallel
series or parallel
none of the above
An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is ....................
nG
(n - 1)G
G/(n - 1)
G/n
A VTVM is never used to measure ...............
voltage
current
resistance
none of the above
A VTVM has ............... input resistance than that of a multimeter
more
less
same
none of the above
A voltmeter should have .............. resistance
zero
very high
very low
none of the above
A voltmeter is connected in ............... with the circuit component across which potential difference is to be measured
parallel
series
series or parallel
none of the above
A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is .....................
nG
G/n
G/(n - 1)
(n - 1)G
A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement ?
3 kohm
1.5 kohm
4.5 kohm
6 kohm
A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ...............
GS/(G + S)
G + S
G - S
none of the above