Question # 1

The change of magnetic flux through a circuit will produce

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Magnetic Field

Electric Field

emf

a.c

The magnitude of chemical Effects depends upon:

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Nature of liquid

Quantity of Electricity passed through the liquid

Color of the liquid

Both (A) and (C)

Both (A) and (B)

According to kinetic theory of gases, molecules of a gas behave like

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Inelastic spheres

Perfectly elastic rigid sphere

Perfectly elastic non-rigid spheres

Inelastic non-rigid spheres

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

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V/e

eV

e/V

V

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

A 5 kg mass is falling freely, the force acting on, it will be

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19.6 N

9.8 N

5 N

Zero

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

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Zero

5μC m^-2

20μC m^-2

8μC m^-2

SI unit of impedance is

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hertz

henry

ampere

ohms

If the velocity time graph is a straight line parallel to the time-axis, then it means:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

Two monochromatic radiations X and Y are incident normally on a diffraction grating.The second order intensity maximum for X coincides with the third order intensity maximum for Y what is the ratio wavelength of X/wavelength of Y?

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1/2

2/3

3/2

2/1

Stoke's law holds for bodies of the shape

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Spherical

Rectangular

Oblog

All of these

For total internal reflection to take place, the angle of incidence must be ______ than critical angle and the light should travel from ______ to ______ medium

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Greater, rarer, denser

Smaller, rarer, denser

Smaller, denser, rarer

Greater, denser, rarer

Young's modulus for copper is

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70 x 10 Nm^-2

91 x 10 Nm^-2

110 Nm^-2

None of these

The principle of rocket motion is based on the

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First law of motion

Second law of motion

Third law of motion

None of these

The magnitude of work is zero when the angle between force and displacement is

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0^o

90^o

10^o

None of these

The twinkling of stars is due to

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The fact that stars do not emit light continususly

The refractive index of the earth's atmosphere fluctuate

Intermittent absorption of star light by its own atmosphere

None of these

In semiconductors at 0 K the valence band is

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Completely filled

Partially filled

No

Yes

When force F makes an angle θ with the position r relative to point O, then the toque will be

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τ = 0

τ = rF cos 0

τ = rF

rF sin θ

The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:

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Isotopes

Isobars

Isomers

Isodiapheres

How many electrons are in one Coulomb ?

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6.2 × 10^-23

6.2 × 10^-21

1.6 × 10^-19

Zero

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