Galvanometer Function and Principles

Galvanometer Function and Principles

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the moving coil suspended type galvanometer, a device used to measure small electric currents accurately. It operates on the principle that a current-carrying coil in a magnetic field experiences a torque proportional to the current. The construction involves a coil wound on a soft iron core, suspended between magnet poles, with a concave mirror for deflection measurement. The working principle involves torque causing coil deflection, balanced by a restoring torque, with the galvanometer constant relating current to deflection.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of a galvanometer?

To measure resistance

To measure feeble current

To measure power

To measure voltage

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

On what principle does a moving coil galvanometer operate?

Electromagnetic induction

Thermal expansion

Electrostatic force

Torque on a current-carrying coil in a magnetic field

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What material is used for the coil in a moving coil galvanometer?

Iron

Silver

Aluminum

Copper

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the phosphor bronze strip in the galvanometer?

To provide electrical insulation

To suspend the coil

To measure deflection

To generate magnetic field

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of the concave mirror in the galvanometer?

To measure deflection

To focus light on the coil

To protect the coil

To generate torque

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the deflection in the coil of a galvanometer determined?

By a digital display

By a lamp and scale arrangement

By a sound signal

By a mechanical pointer

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the coil when a current passes through it in a galvanometer?

It remains stationary

It rotates due to torque

It expands

It contracts

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