Define the current-sensitivity of a moving-coil galvanometer.

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 10

State two factors on which the sensitivity of a moving-coil galvanometer depends.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 11

A current $\text{I}$ flows in a wire of length $\text{L}$. Prove that, if this wire be bent into a circular coil and suspended in a magnetic field $\text{B}$, then the torque acting on it will be maximum given by $𝜏=\left(\frac{1}{4\mathrm{\pi }}\right) {\mathrm{L}}^2 \mathrm{IB}$, when the coil of ‘single’ turn is formed.

EASY

12th ICSE

IMPORTANT

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

Why do you not use a galvanometer as it is as an ammeter?

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 13

State how a moving-coil galvanometer can be converted into an ammeter.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 14

What is the function of shunt in an ammeter?

MEDIUM

12th ICSE

IMPORTANT

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

Why should an ammeter have a low resistance?

MEDIUM

12th ICSE

IMPORTANT

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

Why should the resistance of a voltmeter be very high?

MEDIUM

12th ICSE

IMPORTANT

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

You are provided with one low resistance ${\text{R}}_{\text{L}}$ and one high resistance ${\text{R}}_{\text{H}}$ and two galvanometers. One galvanometer is to be converted to an ammeter and the other to a voltmeter. Show how you will do this with the help of simple labelled diagrams.