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 $R$ .

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

EASY

12th ICSE

IMPORTANT

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

In a Radial Magnetic field:

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 2

Sensitivity of a moving coil galvanometer can be increased by:

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 3

Phosphor-bronze strip in a suspended coil galvanometer is used as a suspension fibre :

MEDIUM

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 4

In an ammeter, 5% of the main current is passing through the galvanometer. If the resistance of the galvanometer is G, then the resistance of the shunt will be :

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 5

The resistance of an ammeter formed by converting a galvanometer will be:

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 6

A moving coil galvanometer can be converted into a Voltmeter by connecting:

EASY

12th ICSE

IMPORTANT

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

A circular loop of insulated copper wire carrying a current of $0.50 A$ is placed with its plane perpendicular to a uniform magnetic field $B = 0.20 T .$ The radius of the loop is 4.9 cm. Calculate the torque exerted by the magnetic field on the coil.