Question # 1

The electric bulb does not obey Ohm's law because.

Choose an answer

Current changes

Resistance changes

Heat is produced

All of these

Which of the following is a method of energy transfer.

Choose an answer

Conduction

Wave motion

Radiation

All of these

The gravitational strength on the surface of moon is 1.6 N kg-1 What will be the mass and weight of an object respectively on the surface of the moon.

Choose an answer

10 kg , 1.6 N

10 Kg , 16 N

16 Kg, 10 N

16 kg, 160 N

Inertial mass and gravitational mass are

Choose an answer

Opposite

Proportional

Weights

Inversely proportional

Which of the following are sources of direct current.

Choose an answer

Batteries

Solare cells

Thermocouples

All of these

In a compound microscope objective lens acts as a projector and eye place as a

Choose an answer

Compensator

Erecting lens

Simple microscope lens

Turntable

Which of the following configuration of BJTs gives both voltage gain and current gain.

Choose an answer

common Base

Common Emtter

Common collector

All of the above

Which phenomenon is responsible formation of shadows.

Choose an answer

Interference of light

Diffraction of light

Polarization of light

Propagation of light

A part of electromagnetic spectrum that can be detected by the human aye

Choose an answer

Angle of incidence

Angle of refraction

Light

Angle of reflection

The process in which a system undergoes a change of state at constant volume.

Choose an answer

Isobaric process

Isochoric process

Isothermal process

Adiabatic process

High concentration of red blood cells increases the viscosity of blood from

Choose an answer

2 -3 time's that of water

3-4 times that of water

3 - 5 times that of water

4 -5 times that of water

A rod of refractive index 1.42 is immersed in a liquid of refractive index 1.42 the rod will

Choose an answer

Become invisible

appear slightly bent

Appear slightly raised

Reduce its refractive index

At which temperature a ferromagnetic material becomes paramagnetic on healing.

Choose an answer

Kelvin temperature

Celsius temperature

Curie temperature

Fahrenheit temperature

If a charged body is moved against the electric field it will gain.

Choose an answer

P.E

K.E.

Electrical P.E.

Gravitational energy

The light rays which combine destructively would mean that resultant

Choose an answer

Intensity increases

Intensity decreases

Amplitude increases

Amplitude decreases

The most abundant isotope of neon is.

Choose an answer

Neon -20

Neon -21

Neon -22

Both a and c

The potential difference between two points is equal to the difference of

Choose an answer

Kinetic energy

potential energy

Electric current

Charge energy

The picture to be transmitted must be scanned because in T.V transmission light wave are first changing into.

Choose an answer

sound wave

Electric fluctuations

Magnetic fluctuations

Signals

The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is.

Choose an answer

Directly proportional to n

Directly proportional to n2

Inversely proportional to n

Inversely proportional to n2

Which type of image is formed by a concave lens on a screen.

Choose an answer

Inverted and real

Inverted and virtual

Upright and real

Upright and virtual

During an adiabatic gas expansion the environment

Choose an answer

Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

Choose an answer

Intensity of incident light

Electric field near the photocathode

Frequency of incident light

Polarization of incident light

at room temperature the p.d. between the two sides of depletion region for silicon is of the order of.

Choose an answer

0.3 V

0.5 V

0.7 V

0.9 V

Thermodynamics deals with

Choose an answer

Isolated systems

The interactions among various parts of the system

The microscopic behavior of a system

The interactions between system and surrounding

A Galilean telescope with objective of coal length 30 cm and eyepiece of focal length.8 cm when focused for infinity has length equal to

Choose an answer

7.5 cm

2.2 cm

38 cm

240 cm

The gas temperature is increased from 27 ^oC to 127 ^oC What is the ratio of mean kinetic energies.

Choose an answer

3/4

4/3

9/10

10/9

The line passing symmetrically though the optical center of the lens is.

Choose an answer

Focal plane

Principal focus

Principal axis

Focal length

Which law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding.

Choose an answer

Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

A straight wire carrying current will experience a force when place in uniform magnetic field if

Choose an answer

The current and field are parallel

The current and field are at an angle

the current and field are parallel in opposite directions

All of the above

If a person winds a coil of wire around a steel rod and then passes an electric current through the wire then the

Choose an answer

Steel rod becomes an electromagnet

Steel rod becomes hot

Wire becomes magnetized

wire becomes demagnetized

What do we study by crystallography.

Choose an answer

The analysis of X ray spectra of elements and study of crystal structure.

Visible spectra of sources and crystal study

Ultraviolet spectra of sources and crystal study

Characteristics of X-rays

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