Question # 1

Victor de-Brogile received the Nobel prize in physics in

Choose an answer

1925

1929

1932

1935

When a person jumps off the ground, the reaction force of the ground is

Choose an answer

greater than the weight of the person

smaller than the weight of the person

equal to the weight of the person

zero

Scalar product is also called:

Choose an answer

Cross product

Dot product

Product scalar

Product vector

At higher frequency of the alternating current, the capacitive reactance X_c

Choose an answer

Increases

Decreases

Remains the same

Increases only when the voltage increases

SI unit of wave length is:

Choose an answer

Kilometer

Metre

Centimetre

Hertz

if the field is directed along the normal to the area, then flux is:

Choose an answer

Maximum

Equal to zero

Equal to BA

Minimum

Both (A) and (C)

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

Choose an answer

9 x 10⁵V

9 V

8 x 10⁶V

80 V

From sand, we get a material used for construction of computer chips. That material is called:

Choose an answer

Germanium

Silicon

Copper

Lead

Examples of moderators used in a fission reactor is/are:

Choose an answer

Water

Heavy water

Carbon

Hydrocarbon

All of these

The study of fluid in motion basically involves law of conservation of:

Choose an answer

Mass

Energy

Change

Both A and C

Both A and B

In the resonance condition, the amplitude of the oscillator becomes

Choose an answer

very large

very small

zero

any one of them

A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh^-1. its acceleration will be

Choose an answer

7.71 m s^-2

0.5m s^-2

0.15m s^-2

0.092m s^-2

Braking radiation causes:

Choose an answer

Continuous spectrum

Line Spectrum

Band spectrum

Discrete specturm

All of these

The graph showing the variation of displacement with time is a

Choose an answer

Sine curve

Straight line

Parabola

None of these

At the present time, the main frontiers of fundamental science are

Choose an answer

2

3

4

5

Amorphous solids:

Choose an answer

Have definite melting points

Are called glassy solids

Have no definite melting point

Both (B) and (C)

Both (A) and (C)

A potential barrier of 0.7 V exists across p-n junction made from:

Choose an answer

Germanium

Silicon

Arsenic

Gallium

Indium

By placing a dielectric in between the charges, the electrostatic force between them

Choose an answer

Is always reduced

Is always increased

Is not affected

Is increased one million times

None of these

The r.m.s value of a.c. current is always

Choose an answer

positive

negative

zero

all of these

An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:

Choose an answer

100 m/sec

140 m/sec

1960 m/sec

196 m/sec

Free oscillations are always produced by:

Choose an answer

An applied force

Gravitational force

Restoring force and inertia

Inertia only

The Stephen-Boltzmann law for the black body radiation is given by

Choose an answer

E = T²

E = -T²

E = T⁴

E = -T⁴

How many isotopes of helium are present?

Choose an answer

1

2

3

4

A typical rocket consists of fuel

Choose an answer

more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

When the atomic particle are moving with velocities approaching that of light:

Choose an answer

Newton's laws become valid

Relativistic effects become prominent

Botha(A) and (B) are valid

Neither (A)nor (B)

There mass becomes zero.

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

Choose an answer

Zero

10⁵m

10^-10N

10⁸N

Centripetal acceleration is also called ______ acceleration:

Choose an answer

Tangential

Radial

Angular

None of them

A solenoid is a coil of wire which is:

Choose an answer

Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Choose an answer

Short wavelength

Large wavelength

Very large wavelenth

Low frequency

Both (B) and (C)

A force of 5 n is acting Y-axis. Its component along X-axis is:

Choose an answer

7 N

5 N

Zero

10 N

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Choose an answer

pair production

Compton effect

photoelectric effect

relativity

More Classes

Other Links

Physics ECAT Pre Engineering Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer