A special class of waves that does not need a material medium for their propagation are called

NTS 2013
Physics
Wave Motion and Sound
Elimination Tool:

Choose the correct arrangement of the various regions of the electromagnetic spectrum in terms of wave length.

ETEA 2017
Physics
Electromagnetic Waves
Elimination Tool:

If the medium is changed from air to diamond what would be the effect in potential difference of a capacitor?

At which of the following places, motion of simple pendulum becomes slowest:

NUMS 2015
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

A car starts from rest and moves with a constant acceleration. During the 5th second of its motion, it covers a distance of 36 meters. What is the acceleration of the car?

NTS 2011
Physics
Motion in Two Dimensions
Elimination Tool:

What will be the gravitational force of attraction between two balls each weighing 5 kg when placed at a distance of 0.33 m apart. (G = 6.673 x 10-7 Nm2/kg2)

NTS 2015 DUHS and JSMU
Physics
Gravitation
Elimination Tool:

Which of the following is CORRECT for photons?

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

What is the dimension of magnetic field

If the speed of an object is doubled, its Kinetic Energy will

Name the scientist who won the noble prize for discovery of energy quanta

A ball moving horizontally with speed ‘v’ strikes the bob of a simple pendulum at rest. The mass of the bob is equal to that of the ball if the collision is elastic the bob will rise to a height:

NTS 2010
Physics
Circular Motion and Momentum
Elimination Tool:

Alpha, Beta, and Gamma radiations are emitted from a radioactive substance:

NUMS 2017
Physics
Nuclear Physics
Elimination Tool:

Half wave voltage multiplier can provide any degree of voltage multiplication by cascading diodes and capacitors.

PMC Practice 12
Physics
Electronics
Elimination Tool:

Plank׳s constant is analogus to:

PMC Sample 3
Physics
Dawn of Modern Physics
Elimination Tool:

If a dielectric material is placed between two plates of a capacitor, the net capacitance of the capacitor:

NUMS Mock 4
Physics
Electrostatics

The rate of change of angular velocity with respect to _____ defines angular acceleration.

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

Two conducting objects X and Y having a charge Q on them exert force F on each other. Now third conductor having a charge -Q is touched to X and is removed, the new force between X and Y will be:

The points which are in phase are separated from one another through a distance of :

PMC Sample 1
Physics
Wave Motion and Sound
Elimination Tool:

The mass of earth on the basis of Newton’s Law of Gravitation is given by:

NTS 2012
Physics
Gravitation
Elimination Tool:

When fluid is incompressible, it means:

NUMS 2018
Physics
Fluid Dynamics
Elimination Tool:

In rotation motion the torque is:

A convex lens gives a virtual image only when the objects leis

Alternating Current Generators use:

PMC Practice 5
Physics
Alternating Current
Elimination Tool:

A 50 watt bulb is operated by 120 volts. What is the current through the bulb?

NTS 2016 SMBBMC
Physics
Current Electricity
Elimination Tool:

If the electric field is E = x/y then y is?

Value of solar constant on the surface of Earth is:

With the usual notation, the first law of thermodynamics applied to one mole of an ideal gas can be written in the following form:

CvΔT=ΔQ – PΔV

In a change for which Boyle’s law is obeyed, which of the following would necessarily be zero?

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.1 m/s2. At the same instant a truck, traveling with a constant speed of 9.2 m/s, overtakes and passes the automobile. How far beyond the traffic signal will the automobile overtake the truck?

NTS 2010
Physics
Motion in Two Dimensions
Elimination Tool:

Unit of CV^2 is equivalent to that of?

At least how many diodes are required to covert A.0 fully into D.C?

An aeroplane is flying in a straight line at a constant altitude. If a wing gust strikes and raises the nose of the airplane, the nose will bob up and down until the plane eventually returns to its original position. These oscillations are:

NUMS Mock 3
Physics
Oscillations and Simple Harmonic Motion

A sound wave travels with a speed of 330ms−1 in air. If the wavelength of the wave is 3.3m, then the frequency of the wave is ______.

PMC Sample 2
Physics
Wave Motion and Sound
Elimination Tool:

Displacement is a:

PMC Practice 2
Physics
Scalars and Vectors
Elimination Tool:

The width of depletion region Increases due to:

Which of the following can be the objective of Polarization:

SI unit of acceleration is

Which of the following field is dependent on the path?

The values of electric intensity will ____ due to the presence of dielectric medium:

PMC 2020
Physics
Electrostatics
Elimination Tool:

If two inductors each of Inductance L are Introduced in a circuit in parallel, the equivalent Inductance will be:

1 Inch = —- cm

Which rays are used in LASER?

PMC 2021 Tested
Physics
Electromagnetic Waves
Wave Motion and Sound
Elimination Tool:

The frequency of AC used in Pakistan is

Radioactive elements emit:

NUMS Mock 2
Physics
Nuclear Physics

In Double Slit experiment, the fringe spacing of the diffracted rays increases when:

UHS 2019
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Two vectors of magnitude 10m and 20m have an angle 30° between them. The component of shorter vector parallel to the longer vector will be:

) Which can damage eye?

Identify the postulate(s) which help to formulate a mathematical model of gases.

I. A finite volume of gas consists of very large number of molecules

II. The size of the molecules is much smaller than the separation between molecules

III. Molecules do not exert force on each other except during a collision.

NUMS Mock 2
Physics
Heat and Thermodynamics

A steel wire hangs vertically from a fixed point, supporting a weight of 80 N at its lower end. The diameter of the wire is 0.50 mm and its length from the fixed point to the weight is 1.5 m. If density of steel wire = 7.8 x 103 kg/m3, then what is the fundamental frequency emitted from the wire.

PMC Sample 2
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

Bimetallic thermostat is an example of:

NTS 2018
Physics
Heat and Thermodynamics
Elimination Tool:

Electrical effects due to friction are studied in:

The earth rotates on its axis once a day. Suppose, by some process the earth contracts so that it’s radius is only half as large as at present, then how long the earth will take to complete it’s rotation?

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

Product of R and C is

A current of 2A is passing through an inductor of 2mH. Energy stored by it is:

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

Compute the gravitational force of attraction between two balls each weighing 10 kg when placed at a distance of 1 metre apart.

NTS 2015 SMBBMC
Physics
Gravitation
Elimination Tool:

1 rad is equal to how many degrees

Find the longest wavelength in the Paschen series, given R = 1.097 x 107m-1.

NUMS 2019 Reconduct
Physics
Atomic Spectra
Elimination Tool:

Wave fronts coming from small light bulb

Dimension of power?

The distance between two consecutive antinodes is equal to:

NUMS 2018
Physics
Wave Motion and Sound
Elimination Tool:

Consider a car is travelling for one hour. Which of the following trips have the same average velocity?

PMC Practice 2
Physics
Scalars and Vectors
Elimination Tool:

Electric conduction is high in:

NUMS 2016
Physics
Physics of Solids
Elimination Tool:

On increasing the spring constant to 4 times its value:

When the frequency of the applied force becomes equal to one of natural frequencies of body then the body oscillates with maximum displacement this phenomenon is called:

UHS 2018
Physics
Wave Motion and Sound
Oscillations and Simple Harmonic Motion
Elimination Tool:

A 4 cm high object is located 10 cm from the converging lens, whose focal length is 20 cm. The image so formed will be:

NTS 2013
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

If ‘0.8 i + 0.5 j + ck’ represents a unit vector, the value of ‘c’ is:

NUMS 2019 Cancelled
Physics
Scalars and Vectors
Elimination Tool:

One kilowatt-hour is commonly termed as one commercial unit of electric energy which is equal to:

PMC 2020
Physics
Current Electricity
Elimination Tool:

Two long, parallel conductors which are free to move are arranged 1.0 cm apart. A steady current of 20 A flows in each of the conductors in the same direction. The conductors:

NUMS Mock 3
Physics
Magnetism and Electromagnetic Induction

A student is performing a lab experiment on simple harmonic motion. He has two different springs (with force constants k1 and k2) and two different blocks (of masses m1 and m2). If k1 =2k2, and m1 = 2m2 , which of the following combinations would give the student the spring-block simple harmonic oscillator with the shortest period?

NTS 2014
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

Resistivity of Silver is ohmmeter

A mass has constant acceleration, what is true about the force applied on it?

NUMS Mock 1
Physics
Forces and Motion

Which of the following series lies in the ultraviolet range:

PMC 2020
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

RLC circuit can be excited by

If both inputs “A” and “B” are ON and the output is also ON. This type of gate is known as:

NUMS 2017
Physics
Electronics
Elimination Tool:

Two bodies ‘x’ and ‘Y’ are attached to the ends of a string which passes over a pulley so that the two bodies hang vertically. If the mass of the body ‘x’ is 5 kg and that of body ‘Y’ is 4.8 kg. Find the acceleration?(g = 9.8 m/s^2)

NTS 2015 DUHS and JSMU
Physics
Forces and Motion
Elimination Tool:

Electric Generators work on the principle of:

Calculate the energy of a photon of wavelength 6600 Angstroms:

PMC Practice 5
Physics
Dawn of Modern Physics
Elimination Tool:

A conductor of length L is moved across a magnetic field. Due to this activity, a potential difference appears across the ends of the conductor. This type of potential difference is termed as:

NTS 2018
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

What is the change in kinetic energy of a proton when it is accelerated through a potential difference of 2MV?

PMC Sample 1
Physics
Electrostatics
Elimination Tool:

Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is

The product of frequency and time period is equal to:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

The net charge flowing through any section of the conductor per unit time is known as?

NTS 2015 SMBBMC
Physics
Electrostatics
Elimination Tool:

Refrigerator is an example of:

NUMS 2020
Physics
Heat and Thermodynamics
Elimination Tool:

Unit of magnetic flux density is

Two forces equal in magnitude but opposite In direction and not acting along the same line constitute a couple. The movement of this couple will be:

NTS 2018
Physics
Forces and Motion
Elimination Tool:

If the body is rotating with uniform angular velocity, then its torque is:

NUMS 2016
Physics
Circular Motion and Momentum
Elimination Tool:

An object whose mass is 100 g starts from rest and moves with constant acceleration of 20 cm/s2. At the end of 8s its momentum in g cm / s is:

NTS 2016 SMBBMC
Physics
Work, Power and Energy
Elimination Tool:

Gamma rays are emitted from nuclei of radioactive atoms. They are nothing but:

NTS 2016 DUHS & JSMU
Physics
Nuclear Physics
Elimination Tool:

If the radii of two droplets are in the ratio 2:3, what will be the ratio of their Terminal velocities?

Germanium and silicon are semiconductors having crystalline structures. Both these materials have ______ valence electrons in their outermost shells.

NTS 2014
Physics
Electromagnetic Waves
Elimination Tool:

60) What happens when a positive rod is placed near a neutral sphere?

Which pair includes a vector quantity and a scalar quantity respectively?

NTS 2017
Physics
Scalars and Vectors
Elimination Tool:

1. Which one type of fibre is more suitable for transmission of signals in which white light is used?Which one type of fibre is more suitable for transmission of signals in which white light is used?

When describing the isotopes of the same element, the most accurate statement is that they have:

NTS 2017
Physics
Atomic Spectra
Elimination Tool:

In Compton’s effect the wavelength of the scattered photon is

If two sounds have the same wavelength in air at the same temperature, what other property must they also have in common?

Intensity
Amplitude
Frequency
NTS 2017
Physics
Wave Motion and Sound
Elimination Tool: