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12th ICSE

IMPORTANT

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A $80 Ω$ galvanometer shows a deflection of $1$ division per mA. It has $50$ divisions on its scale. If a shunt of $2.5 Ω$ be attached to the galvanometer, what maximum current(in $A$ ) will this galvanometer measure?

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Important Questions on Torque on a Current-Loop : Moving-Coil Galvanometer

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 15

The coil of a galvanometer has a resistance of

100 Ω

. It shows full-scale deflection for a current of

5 \times 10^{- 4} A

. To convert it into a voltmeter to read a maximum potential difference of

5 V

, resistance(in

Ω

) added in the series is

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 16

50 Ω

resistance galvanometer has

25

divisions on its scale. On sending a current of

4.0 \times 10^{- 4} A

in it, the pointer gives a deflection of

1

division. How much resistance should be connected in series with the galvanometer to convert it into a voltmeter of

2.5 V

range?

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 17

The resistance of a voltmeter is

180 Ω

. When there is

5 V

potential difference across its ends, it gives full-scale deflection. What resistance (in ohms) should be connected in series to obtain a full-scale deflection at

25 V

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12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 18

A galvanometer coil has a resistance of

15 Ω

and it shows full-scale deflection for a current of

2.0 mA

. Shunt required(in

Ω

) to convert it into an ammeter of range

0

5.0 A

in nearest integer is

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 18

A galvanometer coil has a resistance of

15 Ω

and it shows full-scale deflection for a current of

2.0 mA

. It is converted into a voltmeter of range

0

15.0 V

. Determine the net resistance of the voltmeter in

Ω

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 19

A galvanometer with a coil of resistance

12.0 Ω

shows a full-scale deflection for a current of

2.5 mA

. How will you convert it into an ammeter of range

0

7.5 A

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 19

A galvanometer with a coil of resistance

12.0 Ω

shows a full-scale deflection for a current of

2.5 m A

. How will you convert it into (b) a voltmeter of range

0

10.0 V

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 20

The given circuit is used to measure the resistance R. The ammeter reads $2 A$ and the voltmeter $120 V .$ What is the value of R if the resistance of the voltmeter is $3000 Ω$ ? If the resistance of the voltmeter is taken to be infinitely large, then what is the value of $R$ .

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A 80 Ω galvanometer shows a deflection of 1 division per mA. It has 50 divisions on its scale. If a shunt of 2.5 Ω be attached to the galvanometer, what maximum current(in A) will this galvanometer measure?

Important Questions on Torque on a Current-Loop : Moving-Coil Galvanometer

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A $80 Ω$ galvanometer shows a deflection of $1$ division per mA. It has $50$ divisions on its scale. If a shunt of $2.5 Ω$ be attached to the galvanometer, what maximum current(in $A$ ) will this galvanometer measure?