Question # 1

Certain gas are called permanent gases because.

Choose an answer

They cannot be liquified

They are perfect gases

The critical temperatures are low

their boiling points are low

Huygen's principle is used to explain the

Choose an answer

Speed of light

Dispersion of light

Propagation of light

Reflection of light

With which factor disputative power of a grating increases.

Choose an answer

Order of spectrum

Number of lines per centimeter

Order and number of lines per centimeter

Shape of the grating

In L-C parallel circuit the capacitor draws a

Choose an answer

Lagging current

Leading current

Lagging voltage

Leading voltage

The SI unit of equivalent dose is

Choose an answer

Seivert

Gray

Radian

Rem

One becquerel is equal to

Choose an answer

Decay of orie radioactive atoms per second

Decay of 10 radioactive atoms per secnd

Decay of 100 radioactive atoms per second

Decay of infinity radioactive atoms per second.

Negative feedback

Choose an answer

Increases stability

Decreases stability

Produces oscillatory

Cannot occur

The diffraction of light was discovered by

Choose an answer

Newton

Young

Francesco Grimaldi

Hertz

Shadow formation and the pin hole camera illustrate the

Choose an answer

Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

Which of the following is not electromagnetic .

Choose an answer

x-rays

Gama rays

Cathood rays

Infrared rays

When temperature increases, frequency of an organ pipe

Choose an answer

Decreases

Increases

Remain the same

Become zero

With high frequencies capacitive reactance

Choose an answer

Increases

Decreases

Becomes double

Becomes half

The minimum angle of incidence for which total internal reflection can occur is called.

Choose an answer

Right angle

Acute angle

Critical angle

Obtuse angle

Commutator was invented in

Choose an answer

1820

1830

1834

1840

As oscillator is basically an amplifier with loop gain

Choose an answer

Zero

Infinity

Less than unity

More than unity

The maximum energy of photons emitted from ab X rays tube is certain to be increased by

Choose an answer

Increasing the voltage across the tube

Decreasing the voltage across the tube

Heating the metal target

Putting a barrier in the way of photons

What is the change in path when sound wave is reflected from a rigid support.

Choose an answer

Lamda /2

Lamda

2 lamda

Zero

The output of a generator which uses a split ring commutator is.

Choose an answer

sinusoidal A.C. wave

Pulsating D.C. wave

Constant D.C Voltage

Linerly increasing voltage.

At high temperature a body generally emits redactions of.

Choose an answer

Small wavelengths

Long wavelengths

Moderates wavelengths

Zero wavelengths

The inductance in a coil plays the same role as

Choose an answer

Inertia plays in machans

torque plays in machines

Energy plays in machines

Momentum plays in machines

Wave motion in air consist of

Choose an answer

Longitudinal waves

Transverse waves

Seismic waves

Polarized waves

Which of the following is not the SI unit of magnetic flux density.

Choose an answer

Wb m2

N A-1 m-1

Tesla

N mA-1

The maximum displacement from the undisturbed position of the medium to the crest top is called.

Choose an answer

Wavelength

Amplitude

Period

Frequency

When a force is applied on a body several effects are possible which of the following effect could not occur.

Choose an answer

The body speeds up

The body changes direction

The pressure on the body increases

The mass of the body decreases

Which of the following colours of light passes through glass with minimum speed.

Choose an answer

Green

Yellow

Red

Violet

The process of combining low frequency signals with high frequency radio waves is called.

Choose an answer

Modulation

Resonance

Fluctuation

Amplitude

Most cooking involves

Choose an answer

Adiabatic process

Isothermal process

Isobaric process

Isochoric process

The SI unit of mutual induction a

Choose an answer

Vs-1 A-1

V m -1 A-1

Henry

Tesla

The field in which the work done is independent of the path followed.

Choose an answer

Conservative field

Electric field

Magnetic field

Non conservative field

The unit of intensity of sound waves is.

Choose an answer

W m-1

W m-2

N m-1

N m-2

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

Choose an answer

9.8 N

29. 6 N

26.5 N

30.5 N

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