Direction: It consists of two statements, one labelled as Statement (I) and the other as Statement (II). Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I): The ammeter loading effect is due to the high resistance of the ammeter.Statement (II): Increasing the resistance of voltmeter will reduce the voltmeter loading effect.

Both statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)

Both statement (I) and Statement (II) are individually true and Statement (II) is not the correct explanation of Statement (I)

Statement (I) is true but Statement (II) is false

Statement (I) is false but Statement (II) is true

A moving-coil instrument gives full-scale deflection of 10 mA, when a potential difference of 10 mV is applied across its terminals. To measure currents up to 100 A, the same instrument can be used

with series resistance of 0.01 Ω

with shunt resistance of 0.0001 Ω

with series resistance of 0.01 Ω

with shunt resistance of 0.01 Ω

with series resistance of 0.0001 Ω

14 + Mcqs in Extension Ranges Of Basic Meters in Electrical Engineering Page 1 McqOptions

1.	A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying factor (The ratio of measured current to galvanometer current) of a 100 Ω shunt with this galvanometer is
A.	110
B.	100
C.	11
D.	10
Answer» D. 10

Discussion

2.	A 1 m Amp, 50 Ω Galvanometer is required to measure 5 Amp (full scale). Find out the value of resistance to be added, across (shunt) the Galvanometer to accomplish this measurement.
A.	10 Ω
B.	0.01 Ω
C.	1.0 Ω
D.	0.001 Ω
Answer» C. 1.0 Ω

Discussion

3.	Direction: It consists of two statements, one labelled as Statement (I) and the other as Statement (II). Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I): The ammeter loading effect is due to the high resistance of the ammeter.Statement (II): Increasing the resistance of voltmeter will reduce the voltmeter loading effect.
A.	Both statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
B.	Both statement (I) and Statement (II) are individually true and Statement (II) is not the correct explanation of Statement (I)
C.	Statement (I) is true but Statement (II) is false
D.	Statement (I) is false but Statement (II) is true
Answer» E.

Discussion

4.	A 10A DC Ammeter has a resistance of 0.1 Ω is to be extended to 50 A, the required shunt wire is
A.	Manganin wire of 20 m Ω
B.	Constantan wire of 20 m Ω
C.	Manganin wire of 25 m Ω
D.	Constantan wire of 25 m Ω
Answer» D. Constantan wire of 25 m Ω

Discussion

5.	A shunt resistance of 50 Ω is required for extending the range of an ammeter from 100 to 500 μA. the value of internal resistance of the ammeter is:
A.	400 Ω
B.	200 Ω
C.	800 Ω
D.	100 Ω
Answer» C. 800 Ω

Discussion

6.	A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V?
A.	9 Ω
B.	99 Ω
C.	990 Ω
D.	9990 Ω
Answer» E.

Discussion

7.	A moving coil instrument has full scale deflection at 50 mV and 10 mA. The value of shunt resistance required to be connected to convert it into a (0-5A) ammeter is:
A.	0.005 Ω
B.	0.01 Ω
C.	0.001 Ω
D.	1 Ω
Answer» C. 0.001 Ω

Discussion

8.	A 0-1 mA FSD ammeter is to be used to measure 0-100 mA full-scale deflection using a shunt. If the internal resistance of the meter is 200 Ω, what is the required shunt resistance?
A.	4.04 Ω
B.	3.03 Ω
C.	2.02 Ω
D.	1.01 Ω
Answer» D. 1.01 Ω

Discussion

9.	A moving-coil instrument gives full-scale deflection of 10 mA, when a potential difference of 10 mV is applied across its terminals. To measure currents up to 100 A, the same instrument can be used
A.	with shunt resistance of 0.0001 Ω
B.	with series resistance of 0.01 Ω
C.	with shunt resistance of 0.01 Ω
D.	with series resistance of 0.0001 Ω
Answer» B. with series resistance of 0.01 Ω

Discussion

10.	If the voltmeter has a range of 2 V and sensitivity is 1 kΩ/V, what will be the reading of the voltmeter in the circuit?
A.	0.33 V
B.	0.66 V
C.	0.99 V
D.	0.44 V
Answer» C. 0.99 V

Discussion

11.	In the circuit shown below, the ammeter reads 0.1 A and the voltmeter reads 10 V. The internal resistance of the ammeter is 1 Ω and that of the voltmeter is 500 Ω. What is the value of R?
A.	100 Ω
B.	125 Ω
C.	90 Ω
D.	120 Ω
Answer» C. 90 Ω

Discussion

12.	A 50 μA basic d’Arsonval movement with an internal resistance of 500 Ω is to be used as a voltmeter. The value of the multiplier resistance required to measure a full-scale voltage range of 0-5 volts is
A.	999.5 kΩ
B.	99.5 kΩ
C.	9.99 kΩ
D.	0.99 kΩ
Answer» C. 9.99 kΩ

Discussion

13.	A 0.5 Ω resistance is required to be connected in parallel to a moving coil instrument whose full scale deflection is 1 mA; so that this instrument can measure 10 mA current. Internal resistance of this instrument is
A.	5.0 Ω
B.	4.5 Ω
C.	2.25 Ω
D.	0.45 Ω
Answer» C. 2.25 Ω

Discussion

14.	A 1 mA galvanometer with internal resistance of 50 Ω is to be converted to measure 5 A (full-scale). What is the value of the shunt resistance required for this conversion?
A.	1 Ω
B.	0.01 Ω
C.	1 kΩ
D.	10 Ω
Answer» C. 1 kΩ

Discussion

Explore topic-wise MCQs in Electrical Engineering.

A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying factor (The ratio of measured current to galvanometer current) of a 100 Ω shunt with this galvanometer is

A 1 m Amp, 50 Ω Galvanometer is required to measure 5 Amp (full scale). Find out the value of resistance to be added, across (shunt) the Galvanometer to accomplish this measurement.

A 10A DC Ammeter has a resistance of 0.1 Ω is to be extended to 50 A, the required shunt wire is

A shunt resistance of 50 Ω is required for extending the range of an ammeter from 100 to 500 μA. the value of internal resistance of the ammeter is:

A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V?

A moving coil instrument has full scale deflection at 50 mV and 10 mA. The value of shunt resistance required to be connected to convert it into a (0-5A) ammeter is:

A 0-1 mA FSD ammeter is to be used to measure 0-100 mA full-scale deflection using a shunt. If the internal resistance of the meter is 200 Ω, what is the required shunt resistance?

A moving-coil instrument gives full-scale deflection of 10 mA, when a potential difference of 10 mV is applied across its terminals. To measure currents up to 100 A, the same instrument can be used

If the voltmeter has a range of 2 V and sensitivity is 1 kΩ/V, what will be the reading of the voltmeter in the circuit?

In the circuit shown below, the ammeter reads 0.1 A and the voltmeter reads 10 V. The internal resistance of the ammeter is 1 Ω and that of the voltmeter is 500 Ω. What is the value of R?

A 50 μA basic d’Arsonval movement with an internal resistance of 500 Ω is to be used as a voltmeter. The value of the multiplier resistance required to measure a full-scale voltage range of 0-5 volts is

A 0.5 Ω resistance is required to be connected in parallel to a moving coil instrument whose full scale deflection is 1 mA; so that this instrument can measure 10 mA current. Internal resistance of this instrument is

A 1 mA galvanometer with internal resistance of 50 Ω is to be converted to measure 5 A (full-scale). What is the value of the shunt resistance required for this conversion?