EASY

12th CBSE

IMPORTANT

Earn 100

How will you convert $1 mA$ full scale deflection galvanometer of resistance $100$ ohms into an ammeter to read $1 A$ (full scale deflection) and into a voltmeter to read $1$ volt (full scale deflection).

Important Questions on Magnetic Effect of Current

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 4

A moving coil galvanometer of resistance

10 Ω

produces full scale deflection, when a current of

25 m A

is passed through it. Describe showing full calculations, how will you convert the galvanometer into (i) a voltmeter reading up to

120 V

and (ii) an ammeter reading up to

20 A

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 5

A galvanometer of resistance

20 Ω

gives a deflection of one division when a potential difference of

4 m V

is applied across its terminals. Calculate the resistance of the shunt if the current of

10 A

is to be measured by it. The galvanometer has

25

divisions.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 6

A galvanometer of resistance

40 Ω

gives a deflection of

5

divisions per

mA

. There are

50

divisions on the scale. Calculate the maximum current that can pass through it when a shunt resistance of

2 Ω

is connected.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 7

It is intended to measure a maximum current of

25 A

with an ammeter of range

2.5 A

and resistance

0.9 Ω

. How will you do it? What will be the combined resistance?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 8

A galvanometer has a resistance of

100 Ω

. A difference of potential of

1.0 V

between its terminals gives a full-scale deflection. Calculate the shunt resistance which will enable the instrument to read up to

2 A

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 9

A resistance of

900 Ω

is connected in series with a galvanometer of resistance

100 Ω

. A potential difference of

1 V

produces a deflection of

100

divisions in the galvanometer. Find the figure of merit of the galvanometer.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 10

A galvanometer has a sensitivity of

60

divisions per ampere. When a shunt is used, its sensitivity becomes

10

divisions per ampere. What is the value of the shunt used if the resistance of the galvanometer is

20 Ω

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 11

A shunt of

6 Ω

is connected across a galvanometer of resistance

294 Ω

. Find the fraction of the total current passing through the galvanometer.

How will you convert 1 mA full scale deflection galvanometer of resistance 100 ohms into an ammeter to read 1 A (full scale deflection) and into a voltmeter to read 1 volt (full scale deflection).

Important Questions on Magnetic Effect of Current

Learn and Prepare for any exam you want !

How will you convert $1 mA$ full scale deflection galvanometer of resistance $100$ ohms into an ammeter to read $1 A$ (full scale deflection) and into a voltmeter to read $1$ volt (full scale deflection).