Tangent Law And Galvanometer - Questions & Answers | Exam2Win

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1. The deflection magnetometer works on the principle of

A. Coulomb’s law

B. Biot-savart law

C. Tangent law

D. Ampere law

Explanation:

2. The field at the centre of a coil of radius 16 cm having 10 turns and carrying a current of 8 A is

A. 25 A-turns/m

B. 2.5 A-turns/m

C. 8010-2 A-turns/m

D. 250 A-turns/m

Explanation:

3. A tangent galvanometer is an absolute instrument because

A. it uses a small magnetic needle

B. it measures earth’s magnetic field

C. it is sensitive around 45°

D. it does not take the help of other instruments for calibration

Explanation:

4. A current of 1.5A flows through the coil of 5 turns of a tangent galvanometer having a diameter 0.3m. If the deflection of the needle at its centre is 45°, then the horizontal intensity of earth’s field at that place is

A. 250 A-turn/m

B. 25 A-turn/m

C. 2.5 A-turn/m

D. 2500 A-turn/m

Explanation:

5. The tangent galvanometer is used to determine

A. potential difference

B. deflection

C. resistance

D. current

Explanation:

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