Question # 1

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

The body of physics involves

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical Changes

The direction of induced current is always so as to oppose the cause which produces it. This is

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Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

Photoelectrons are emitted when ultraviolet light falls on:

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Casium

Silver

Potassium

Any of these

None of these

The center of mass of a sphere lies at:

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The axis of the sphere

Circumference of sphere

Center of the sphere

None of them

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be

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1 cm

2 cm

8 cm

None

When the pn-junction is in reversed biased, current flows through the junction due to the

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majority carriers

minority carriers

either of them

none of them

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

Huygen's theory cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

The total charge of any nucleus is given as

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Ze²

Z²e

Z/e

Ze

Cladding means a layer of ______ refractive index over the central core of ______ refractive index

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Lower, lower

Higher, lower

Lower, higher

None of these

How large a force is required to accelerate a body of weight 5 N with 4 ms^-2 is

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10 N

5 N

2 N

1 N

Gravity performs zero work when body moves

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Vertically

Horizontally

At angle 60° with vertical

At angel 60° with horizontal

Bulk modulus is involved when the deformation is

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One dimensional

Two dimensional

Three dimensional

All of these

In case of point source of light, shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

As the object is brought from a far off point to he focus, the magnification goes on

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Increasing

Decreasing

Do not change

None of these

Mathematically, the instantaneous acceleration is represented by

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Crystalline solid do not show

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Sharp melting points

Flat faces

Long range order

Isotropic expansion coefficients

For a circular orbit, the satellite has speed of

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20,000 kmh^-1

25,000 kmh^-1

26,000 kmh^-1

27,000 kmh^-1

If the instant velocity does not change, the body is moving with a

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Initial velocity

Variable velocity

Uniform velocity

None of these

The relative permitivity ∈_r for transformer oil is

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2.9

3.0

2.1

2.4

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