Question # 1

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m³during its steady flow

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1.3 m/s

1.6 m/s

1.9 m/s

2.2 m/s

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

Acceleration of the mass at any instant is given by

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a=k/m x

a= - m/k x

a = - k/m x

a=m/k x

The rain drop falling from the sky reach the ground with

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Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

acceleration greater than g

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be

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20 ms^-2

10 ms^-2

2 ms^-2

1 ms^-2

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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They have the same potential

They have the same amount of charge

They have the same capacity

They have the same shape

An electronic computer is basically a vast arrangement of electronic switches which are made from

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Resistors

Transistors

N -type crystals

P-Type crystals

Capacitors

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

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R/2

P

2P

Depending on the relative mass of the gases

The deflection by Einstein is as great as newtons is

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Twice

Thrice

Four times

Half time

When the velocity of a body is decreasing, the acceleration produced is

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Positive acceleration

Negative acceleration

No acceleration produced

None of these

Waves in ocean are produced due to

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Tidal movement

Winds

Both A and B

Sunlight

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

Bulk modulus for aluminium is

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40

70

75

95

The SI unit of momentum is

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Kgms^-1

Kgms^-2

N.S

a and c

Bulk modulus for copper is

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50

75

140

147

The physical quantity, which produces angular acceleration is called

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Centripetal force

Torque

Angular velocity

Moment of inertia

While vibrating the atoms are at their

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Fixed positions

Extreme position

Average positions

None of these

The results of mechanical tests are usually expressed in terms of

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stress

strain

stress and strain

neither stress nor strain

In YDS experiment, the condition for constructive interference of two coherent waves is that the path difference should be

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Integral multiple ofλ/2

Integral multiple ofλ

Even integral multiple ofλ/2

Both A and C

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