Question # 1

Blood pressure is measured in torr. Which of the following units could belong to torr?

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N m^-1

N m^-2

N m

N^-1m^-2

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

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Mg

1/2 Mg

Zero

2 Mg

The term Brownian movement refers to

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irregular motions of small particles suspended in a fluid

convection currents in a liquid or gas

convection currents in a gas but not in a liquid

the stretching of a body beyond its elastic limit

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

The RMS value of alternating current is:

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0.7 times at the peak value

0.5 times the peak value

0.7 times the Instantaneous value

Equal to maximum voltage

None of these

When a constant potential difference is applied across the conductor, the drift velocity of electrons:

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Increases

Decreases

Remains the constant

Either of these

None of these

Method "lamp and scale arrangement" used to measure the

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angle of deflection

restoring torque

magnetic field strength

current

The pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

The natural frequency of a pendulum which is vibrating freely, depends upon its

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mass

length

material

all of them

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

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q = Q/4

q = Q/2

q = !

None of these

When first condition of equilibrium is satisfied the body has

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no linear acceleration

no angular acceleration

rational equilibrium

none of them

A beam of light enters air from water.Which of the following characteristics of light will not change in water

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Frequency

Wavelength

Velocity

Amplitude

The relative permitivity for vacuum is

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1

2

1.002

1.004

An average energy used by the car-from petrol in its life time

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1 × 10⁹ J

1 × 10¹⁰ J

1 × 10¹¹ J

1 × 10¹² J

The discuss used by athletes has a mass of 1 kg, its weight in newtons is

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9.8 N

80 N

98 N

100 N

The velocity v of a particle at time t is given by:

v = at + b/t + c

The dimensional formula of a, b and c care respectively:

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L²;T and LT²

LT²; LT and L

LT²; L and T

L;LT and T^-2

Prefix pico stands for

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10^-9

10^-6

10^-15

10^-12

When the direction of r and F are reverse

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the direction of torque remain unaltered

the magnitude of torque remain unchanged

both the magnitude and direction of torque remain unchanged

both the magnitude and direction of torque change

Glass is an example of

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crystalline solid

amorphous solid

polymeric solid

none of them

In thrill machine rides at amusement parks, there can be an acceleration of

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2 g

3 g

More than 3 g

4 g

When an image formed by the objective lies at the focus of both the objective and the eye-piece, the telescope is said to be in

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Final adjustment

Normal adjustment

Initial adjustment

None of these

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