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JEE Main

IMPORTANT

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In the diagram shown, the reading of voltmeter is $20 V$ and that of ammeter is $4 A$ . The value of $R$ should be (consider given ammeter and voltmeter are not ideal).

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Important Questions on Electrical Measuring Instruments

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 7

A voltmeter having a resistance of

998 Ω

is connected to a cell of EMF

2

V

and internal resistance

2 Ω

. The error in the measurement of

emf

will be:

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 8

100 V

voltmeter, of internal resistance

20 kΩ

, in series with a high resistance

R

, is connected to a

110 V

line. If the voltmeter reads

5 V

, the value of

R

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 9

In the given circuit, the emf of the cell is $2 V$ and the internal resistance is negligible. The resistance of the voltmeter is $80 Ω$ . The reading of the voltmeter will be

Question Image

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 10

A Galvanometer has $30$ divisions and its sensitivity is $16 μA {division}^{- 1}$ . It can be converted into a Voltmeter, to read $3 V$ , by connecting

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 11

Voltmeters

V_{1}

and

V_{2}

are connected in series across a DC line.

V_{1}

reads

80 V

and has a

per volt

resistance of

200 Ω

V_{2}

has a total resistance of

32 kΩ

. The line voltage is

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 12

A voltmeter has a range

0 - V

with a series resistance

R

. With a series resistance

2 R

, the range is

0 - V^{'}

. The correct relation between

V

and

V^{'}

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 13

A moving coil galvanometer is converted into an ammeter reading up to

0.03 A

, by connecting a shunt of resistance

4 r

across it, and into an ammeter reading up to

0.06 A

, when a shunt of resistance

r

is connected across it. What is the maximum current which can be sent through this galvanometer, if no shunt is used?

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 6 - Electrical Measuring Instruments>DPP>Q 14

In the circuit shown, the galvanometer shows zero current. The value of resistance $R$ is

Question Image

In the diagram shown, the reading of voltmeter is 20 V and that of ammeter is 4 A. The value of R should be (consider given ammeter and voltmeter are not ideal).

Important Questions on Electrical Measuring Instruments

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In the diagram shown, the reading of voltmeter is $20 V$ and that of ammeter is $4 A$ . The value of $R$ should be (consider given ammeter and voltmeter are not ideal).