Question # 1

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90° is called:

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Angle of incidence

Critical angle

Angle of refraction

Angle of deviation

When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

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The same as direction of field

Opposite the direction of field

Makes an angle of 45^owith the current

At right angle to both the field and the current.

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

The coil of a transformer which is connected to A.C is called:

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Primary coil

Secondary coil

Field coil

Armature coil

According to Fleming's left hand rule the direction of magnetic field is indicated by:

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Thumb

Forefinger

Middle finger

Right hand rule

The magnetic field of a solenoid resembles as:

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Iron wire

U-shape magnet

Bar magnet

Point charge.

George Boole invented:

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Boolean algebra

Arithmetic algebra

Mean algebra

Geometry

The refracted light striking to the side of prism is called:

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Refracted ray

Incident ray

Reflected ray

Emergent ray

In D.C.motor split rings are made of:

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Steel

Carbon

Copper

Iron

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

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

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

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

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

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