Question # 1

A body is moving through a viscous medium eventually comes to rest because of:

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Force of gravity

Force of friction

Its weight

Both A and C

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

The range ofβ-particle in air is greater than that ofα-particle by

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1000 times

100 times

15 times

10 times

Most practical applications of electricity involve

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Charges at rest

Charges in motion

Electrons at rest

Atoms in motion

Molecules in motion

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

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base and emitter

collector and emitter

base and collector

any one of these

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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Protactinium

Actinium

Uranium

Radium

Redon

The basic circuit elements of A.C circuit are

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Resistor

Inductor

Capacitor

All the three

A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?

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4.2 m

8.4

12.6

None of these

A mass difference of 0.0012 u is equivalent to and energy of:

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0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

The apparent weight of tiger having mass 10 kg in lift which is ascending upward with an acceleration 1 metre per second square.(g = 10 ms^-2)

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50 N

80 N

100 N

110 N

Minimum number of unequal forces whose vector sum can be zero is

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3

4

2

5

When a horse pulls a cart.the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

Approximate power of a car moving at a speed of 90 kmh^-1 in watts

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1.1 × 10⁵

1.2 × 10⁶

1.3 × 10⁷

1.4 × 10⁸

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second (g = 10 m/s²).

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58.8 m/s

49 m/s

65 m/s

19.6 m/s

The difference between C_pand C_vis equal to

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Universe gas constant

Plank's constant

Molar gas constant

Boltzmann constant

If we know the refractive index of glass, speed v of light in the glass can be found by

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v = c n

v = c/n

v = n/c

None of these

Spectrometer using diffraction grating can measure

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Wavelength of light

Frequency of light

Intensity of light

None of these

Gain of operational amplifier is independent of;

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Internal structure

External Structure

Batteries

Potential changes

An optical fibre with its protective case may be typically 6.0 mm in diameter and yet it can replace bundle of copper of diameter

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6.79 cm

6.95 cm

7.52 cm

7.62 cm

According to the relation for constructive destructive interference, the point of contact has zero thickness of air so it should have

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No interference

Conductive interference

Destructive interference

None of these

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