Question # 1

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

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1/4 times

4 times

Twice

1/2 of 8 cm diameter pipe

Alternating current can induce voltage because it has a

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High peak value

Varying magnetic field

Stronger field than direct curren

Constant magnetic field

Deep water almost runs still when surface water flow in rivers. What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

When a conductoris moved across a magnetic field:

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Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

In equation F=ma, then mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

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Has a definite pitch

Has a definite quality

Has a definite capacity

Can penetrate the wall

The maximum drag force on a falling sphere is 9.8 N, it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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5 volt

3 volt

15 volt

9 volt

How many number of anodes used in electron gun

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one

two

three

six

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

The solids are classified as:

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Metals

Crystalline

Amorphous

Polymeric

All except (A)

Planck's constant has the dimensions of:

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Energy

Momentum

Frequency

Angular momentun

The frequency of an open pipe is f. if one end is closed then its fundamental frequencywill be:

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f/2

3f/4

f

2f

The speed of light in a medium of refractive index 1.5 is

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3 x 10⁸ms^-1

4.5 x 10⁸ms^-1

2.0 x 10⁸ms^-1

None of these

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

An optical fibre with its protective case may be typically

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6 m

6 mm

6 cm

6 nm

The diffraction grating is used to determine

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Intensity of light

Wavelength of light

Refractive index of prism

None of these

Age of the Universe is

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5 × 10¹⁵ sec

5 × 10¹⁷ sec

5 × 10¹⁹ sec

None of these

How many main frontiers are of fundamental science ?

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One

Two

Three

None of these

The unit of work function is

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eV

Volt

Farad

Herdz

In an interference pattern of Young,s Double Slit (YDS) experiment

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Bright fringes are wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equally spaced

Central fringes are wider than the outer fringes

An orbital motion in which an artificial satellites adopts

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Circular path

Nearly circular path

Elliptic

None of these

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