Question # 1

N s m^-2is unit of:

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Drag force

Pressure

Surface tension

Coefficient of viscosity

Electric field lines emerge from the charges in

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One dimension

Two dimensions

Three dimensions

Four dimensions

None of these

Wien's constant is measured in:

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Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

Any superconductor with critical temperature above 77 K, is referred as

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low temperature superconductor

high temperature superconductor

very low temperature superconductor

none of them

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

To hear a clear echo, the reflecting surface must be at a minimum distance of

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10 m

16.5 m

33 m

66 m

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

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

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

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polonium uranium

uranium and radium

polonium and radium

none of these

The pattern of crystalline solid is:

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One dimesional

Two dimensional

Three dimensional

Either (A) or (B)

None of these

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

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

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3,6 x 10¹KJ

3,6 MJ

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

A field is uniform and much stronger:

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Inside a long solenoid

Outside a long solenoid

At the end of a long solenoid

At the central point of long solenoid

None of these

In series RC circuit when R=X_c, then the phase angle is

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0°

90°

70°

45°

The SI unit of magnetic flux is

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NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

The critical temperature of mercury is

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1.18 K

4.2 K

3.72 K

7.2 K

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

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45 V

15 V

90 V

300 V

Change in momentum is one second is called:

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Impulse

Force

Energy

Work

The current that flows through the coil of a motor causes:

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shafts to rotate

None of these

The existence of position was predicted by Dirace in

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1920

1925

1930

1928

The state in which ice, water and vapour coexists in equilibrium is called

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zero degree celsius

zero degree fahrenheit

absolute zero

373 K

If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be

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Unequal

Exactly equal

Roughly equal

Zero

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

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6 ohm

4 ohm

zero ohm

1.33 ohm

The unit of resistance is

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volt

ampere

ohm

coat

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

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20 m

400 m

1440 m

2880 m

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

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

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125 J

90 J

160 J

85 J

A signal is amplified at the output without any change of phase, if it is applied at the

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inverting input

non-inverting input

at any of the input

none of these

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