Question # 1

The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.

Choose an answer

100 s

200 s

400 s

750 s

Which force pushes up a body in fluid

Choose an answer

Thrust

Lift

buoyant

Pressure

Two bullets a and b have masses 1 kg and 12 kg respectively.

Choose an answer

K.E. of B will be twice that of A

K.E. of A will be twice that of B

Both have same K.E.

K.E. of A will be half that of B

Which of the following factors determines the resolving power of an instrument.

Choose an answer

magnification

Total length of objective

Diameter of objective

Refractive index of objective

If the number of coulombs per second through a wire of 10 Ohm resistance across a 120 V line is 12, the current is

Choose an answer

5 A

10 A

12 A

15 A

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

Choose an answer

Target material

Accelerating voltage

Filament temperature

Separation between target and the filament

One gray is equal to.

Choose an answer

1 J-1 kg -1

1 J -1 kg -2

1 J 1 -g-1

1 j kg -2

A expression for total work done by the battery to move charge against an induced emf is equal to.

Choose an answer

W = LI2

W = 1/2 LI

W = 1/2 L3I

W = 1/2 LI2

The impedance of the circuit at resonance frequency is

Choose an answer

Minimum

Maximum

Zero

Infinity

Which is the fundamental quantity in electrostatic.

Choose an answer

Electric charge

Electric potential

Electric field

Electric field intensity

As the mass number varies, which of the quantities does not change w.r.t nucleus.

Choose an answer

Mass

Volume

Binding energy

Density

Half life of a radioactive elements 10 minutes If the initial cont. rate is 368 counts per minute for what time count rate reaches 32 counts per minute.

Choose an answer

20 minutes

40 minutes

80 minutes

120 minutes

A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K.

Choose an answer

490 N m-1

980 N m-1

1260 N m-1

1960- N m-1

The total energy of an electron in an orbit around the nucleus is.

Choose an answer

Zero

Unity

Infinity

Negative

Who discovered a relation between electric and magnetic field.

Choose an answer

Hans Christian Oersted

Michelson Faraday

Lenz

Hertz

In ideal gas equation PV = nRT , R is

Choose an answer

Universal gas constant

Avogadro's number

Plank's constant

Gravitational constant

A application of the phenomenon of polarization is in

Choose an answer

The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

A wave reflected from the boundary of a rarer medium will have phase change

Choose an answer

0 ^o

60 ^o

90 ^o

180 ^o

The working of the rocket is based on the principle of.

Choose an answer

Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

The product of force and duration of impact is called.

Choose an answer

Density

Momentum

Torque

Impulse

If the cross sectional area of the pipe decreases the speed of the fluid increase according to.

Choose an answer

Venturi relation

Bernoulli's equation

Equation of continuity

Torriculli's theroem

If each particle of the fluid passing through a point follows the same path then flow is said to be

Choose an answer

Regular flow

Irregualr flow

Turbulent flow

Streamline flow

In a magnifying glass, the objective is placed at a distance

Choose an answer

Less than the focal

Between the focal length and twice the focal length

Greater than twice the focal length

At the focus of the lens

A wave source of frequency 1,000 Hz emits waves of wavelength 0.1 m How long does it take for the waves to travel 2500 m.

Choose an answer

4 s

25 s

40 s

100 s

Absolute zero may be regarded as the temperature of which

Choose an answer

Water freezes

All substances are solids

All gases become liquids

Molecular motioning a gas would ceases

The field inside a hollow spherical conductor is.

Choose an answer

Constantin zero

Constant but not necessarily zero

A function of charge on sphere

a function of distance from the centre

As a result of modulation, the resultant wave is called.

Choose an answer

Carrier wave

Modulated carrier wave

Matter wave

Energetic carrier wave

The magnetic field inside a solenoid is

Choose an answer

Zero

Infinite

Uniform

Non uniform

The nucleus of tritium is called.

Choose an answer

Proton

Triton

Deuleron

Positron

The point midway between the lens surface on its participial axis

Choose an answer

Optical centre

Principal focus

Focal plane

Focal length

Why choke coil is used in an AC circuit.

Choose an answer

To decrease D.C.

To increases A.C.

To decreases A.C

To increase D.C

More Classes

Other Links

PPSC Physics Full Book 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