Question # 1

Flurescent screen is a screen where visible spot

Choose an answer

vanishes

is made

becomes small and large

none of these

Laws of motion are not valid in a system which is

Choose an answer

inertial

non-interial

at rest

moving with uniform velocity

Wien's constant is measured in:

Choose an answer

Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Choose an answer

3/5 ohm

2 ohm

6/5 ohm

3 ohm

How much time, theα-particle more massive than an electron

Choose an answer

600

7000

5000

15000

Angular velocity is a:

Choose an answer

Scalar quantity

Vector quantity

Complex quantity

None of these

The SI unit of magnetic flux is.

Choose an answer

weber

Nm^-1A^-1

tesla

gauss

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

Choose an answer

5N

4N

1.5N

6N

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

Choose an answer

a rocket

an aeroplane

a projectile

a ballon

Equal charges are given to two spheres of different radii. The potential will

Choose an answer

Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

Choose an answer

1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Choose an answer

F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Choose an answer

Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

The SI unit of magnetic flux is

Choose an answer

NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Choose an answer

0.52 A

1 mA

0.7 mA

1.4 A

The irregular and unsteady flow of the fluid is called

Choose an answer

turbulent flow

steady flow

either of them

both of them

Polymers are the chemical combination of carbon with:

Choose an answer

Nitrogen

Oxygen

Hydrogen

All of these

None of these

Which one of the following is the unit of electric field intensity

Choose an answer

JC^-1

Vm^-1

Cm^-1

CJ^-1

Current provided by a battery is maximum when

Choose an answer

Internal resistance equal to external resistance

Internal resistance is greater than external resistance

Internal resistance is less then external resistance

None of these

The expression for restoring force is

Choose an answer

F=ma

F=kx

F= -kx

Kx=ma

Centripetal acceleration is also called ______ acceleration:

Choose an answer

Tangential

Radial

Angular

None of them

The value of relative permittivity of different dielectrics are:

Choose an answer

Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

In full wave rectification, simultaneous action is that:

Choose an answer

Two diodes conduct and two do not.

One diode conduct and three do not.

Three diodes conduct and one does not.

All the four diodes conduct

None of these

The number if neutrons in the nucleus of ₉₂U²³⁵are

Choose an answer

Infinite

92

235

143

Silicon can be obtained from

Choose an answer

Lead

Uranium

An isotope of oxygen

Sand

Another mean of electric potential energy per unit charge is given by:

Choose an answer

Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

When the pn-junction is in reversed biased, current flows through the junction due to the

Choose an answer

majority carriers

minority carriers

either of them

none of them

Solar cell converts sunlight directly into

Choose an answer

potential energy

thermal energy

mechanical energy

electrical energy

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Choose an answer

circular

elliptical

cycloid

straight line

Truth of kinetic energy is confirmed by:

Choose an answer

Diffusion of gases

Brownian motion

Both A and B

None of these

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Choose an answer

70%

100%

35%

38%

More Classes

Other Links

ECAT Pre General Science Physics 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