Question # 1

The turn ratios of a transformer is 10. It means.

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I_s = 10I_p

N_s = N_p

N_s = 10 N_p

V_s =V_p /10

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

The end of solenoid from which lines of force emerge out is called:

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North pole

South pole

North and south pole

None of these

The angle at which prism deviates the incident ray is called:

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Angle of incident

Angle of reflection

Angle of deviation

Angle of minimum deviation

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate:

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The rod and the paper are oppositely charged

The rod acquires a positive charge

The rod and the paper have the same charges

The rod acquires a negative charge

The minimum value of angle of deviation is called:

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Minimum angle

Incident angle

Angle of minimum deviation

None of these

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

The magnetic field of a solenoid resembles as:

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Iron wire

U-shape magnet

Bar magnet

Point charge.

One micro coulomb charge is equal to:

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10^-3c

10³c

10⁶c

10^-6c

Optical fibres works on the principle of:

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Reflection

Refraction

Total internal reflection

Diffraction

In totally reflecting prism one angle is of 90°, and other two angles are of:

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30°,30°

45°,90°

45°,45°

40°,40°

The output of a NAND gate is 0 when:

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Both of its inputs are 0

Both of its inputs are 1

Any of its inputs is 0

Any of its inputs is 1

Magnetic effect of electric current was first discovered by:

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Faraday

Ampere

Volta

Lenz

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Physics 10th Class English Medium Unit 6 Online Test MCQs With Answers

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