Question # 1

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

The restoring force is ______ amd opposite to the applied force within _____:

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Equal, elastic limit

Different, the walls of the laboratory

Different, elastic limit

None of these

The velocity of sound in air depends upon

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Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

When force and displacement are perpendicular to each other than work is equal to

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Unity

Infinity

Zero

-Fd

The number of translation degress of freedom for a diatomic gas is

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2

3

5

6

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

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Magnetic field

Electrostatic field

Electromagnetic field

All of these

None of these

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

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1.24 x 10^-10m

7.92 x 10^-20m

2.78 x 10^-14m

3.88 x 10^-11m

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

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its weight

tension in the string

viscous drag force by air

all of them

For fast moving particles, such as atomic particles in an accelerator, the following branch of physics is applicable

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newtonian mechanics

classical mechanics

relativistic mechanics

all of them

Reflection of light from water, glass, snow and rough road surfaces, for larger angle of incidences, produces

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images

bright images

interference

glare

The viscosity of red blood cells increase than water is from

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2 to 3 times

3 to 4 time

4 to 5 times

3 to 5 times

Volume of metal cylinder with the help of a vernier callipers of least count 0.01 cm when diameter is 1.22 cm and length 5.35 cm. Find its uncertainty as

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6.02 ± 0.1 cm³

6.2 ± 0.1 cm³

6.25 ± 0.1 cm²

6.3 ± 0.1 cm³

The substances in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

According to the Hooke's law the force required to change the length of a wire by '1' is proportional to:

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1^-2

1^-1

1

If a power 2 kilowatt is maintained for 0.5 minute the work done is

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3.6 × 10⁶ J

6.0 × 10⁵ J

6.0 × 10⁴ J

36.0 × 10⁵ J

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

If the water exists from the pipe at the rate 1.5 kgs^-1at speed of 0.3 ms^-1. If the water strikes a wall normally, find the force on the wall is

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5.53 N

5.03 N

1.35 N

0.45 N

With tremendous information carrying capacity is called

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Data entry

Band width

Word processing

None of these

The quantity of motion of the body is called

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Force

Acceleration

Momentum

None of these

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