A sample of an ideal gas may : expand adiabatically or expand isothermally. The net flow of heat into the gas from the exterior is:

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

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

________ are very high energy electromagnetic radiations of the extremely short wavelength emitted from the nuclei of radioactive atoms originating from the high energy transitions of the nucleons in the nuclei.

NTS 2015 DUHS and JSMU
Physics
Atomic Spectra
Elimination Tool:

The minimum distance between an object and its real image in a convex lens is

If A = 2i + 3j – k , B = 4i + 2j – 2k . Find a vector x which is parallel to A but has the magnitude of B?

NUMS Mock 1
Physics
Scalars and Vectors

Half wave voltage multipliers can provide what degree of voltage multiplication?

PMC Practice 4
Physics
Alternating Current
Elimination Tool:

• Q.132 In stretched string the frequency of vibration is given by f=1/2LVF/m. In this equation m has dimension

In electronic circuits, a PN junction diode is used to convert alternating current into direct current. This process is called:

NTS 2018
Physics
Alternating Current
Elimination Tool:

Induced emf depends upon:

The dimensions of volume and acceleration (respectively) are:

NTS 2010
Physics
Measurements
Elimination Tool:

A 3-cm length of wire is moved at right angles across a uniform magnetic field with a speed of 2.0 m/s . If the flux density is 5.0 teslas, what is the magnitude of the induced e.m.f?

NTS 2016 DUHS & JSMU
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

SI unit of velocity Is

The resistivity in SI units is measured in:

NTS 2016 DUHS & JSMU
Physics
Current Electricity
Elimination Tool:

Consider an object placed on a frictionless inclined plane at a height of 5m , if it is released, what will be its velocity at the bottom of the inclined plane?

NUMS 2017
Physics
Forces and Motion
Elimination Tool:

Conductivity equals:

Let L be the length and d be the diameter of the cross section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases the extension of wire will be the maximum?

NUMS 2014
Physics
Physics of Solids
Elimination Tool:

When a body moves in the direction of gravitational force i.e. towards the earth, the work is done by the force of gravity on the body and is ______, whereas when the body moves against the direction of gravitational force, the corresponding work done is ______.

NTS 2014
Physics
Gravitation
Elimination Tool:

Formula of maximum range of projectile is?

Work done by retarding force is:

Ball thrown freely from a tower reaches ground in 4s. The height of tower Is about

The time rate of change of linear momentum of a body is equal to:

NUMS 2020
Physics
Forces and Motion
Elimination Tool:

The uncertainty in momentum and position is due to its:

PMC Sample 1
Physics
Dawn of Modern Physics
Elimination Tool:

What will be the change in potential energy if an electron moves 4.5m in the direction of an electric field of strength 325 N/C?

When there is an increase in the length of the simple pendulum then its time period will:

NTS 2015 SMBBMC
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

A force which is experienced in a magnetic field depends on:

NTS 2011
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

A ball is released from a height h, above a table. Given that air resistance is negligible and 50% of its kinetic energy is converted to other forms of energy at each bounce, what will be the height reached after the second bounce?

In SI units, the unit of Candela is used for the measurement of:

NTS 2016 DUHS & JSMU
Physics
Measurements
Elimination Tool:

A tuning fork A produces 4 beats with another tuning fork B. if the frequency of tuning fork B is 320 Hz, then the frequency of tuning fork A is:

PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:

Efficiency of the Carnot’s cycle will be 100% if the temperature of cold reservoir is:

Which one of the following requires no medium?

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

The velocity of a disc at the bottom of an inclined plane is?

The relation of time of flight with Initial velocity is?

Three times decrease in the distance between the plates of a parallel plate capacitor will _______.

NTS 2019
Physics
Electrostatics
Elimination Tool:

Consider the spectral line resulting from the transition from n=2 to n=1, in atoms and ions given below. The shortest wavelength is produced by:

PMC Sample 3
Physics
Atomic Spectra
Elimination Tool:

Transformer cannot step up

If Compton shift is half of Compton wavelength, then the scattering angle would be:

A sphere of charge +Q is fixed in a position. A smaller sphere of +q is placed near the larger sphere and released from the rest. The small sphere will move away from the large sphere with?

NTS 2014
Physics
Electrostatics
Elimination Tool:

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

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

The principle of an AC generator is.

NTS 2019
Physics
Alternating Current
Elimination Tool:

The time duration between two consecutive heartbeats of a normal human being is

An object is undergoing simple harmonic motion. It’s time period is T and total energy is E. The amplitude of vibration is reduced to half. What is the new time period and total energy of the system?

PMC Practice 5
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

potential difference in charge between two points in a circuit is known as?

If we drop an object, it’s initial velocity is zero. How far will it fall in time ‘t’?

PMC 2020
Physics
Motion in Two Dimensions
Elimination Tool:

The ripple factor of a half-wave rectifier is:

PMC Practice 2
Physics
Alternating Current
Elimination Tool:

Resistance of RCL series circuit at resonance Is?

X rays are similar in nature to:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

In hydrogen spectrum, Lyman and Balmer series belong to which region?

A thermocouple is immersed in water at 373 K and the other in ice at 273K. The emf of the thermocouple Is 90 (μ)V for each 1 K difference in temperature between junctions, and the thermocouple resistance is 6 Ω. What current will flow in the galvanometer connected in series with an internal resistance of 30ohms?

NTS 2010
Physics
Heat and Thermodynamics
Current Electricity
Elimination Tool:

Displacement of an object with respect to a constant moving (v) frame in the same direction is:

PMC Sample 1
Physics
Forces and Motion
Elimination Tool:

The magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called:

NUMS Mock 2
Physics
Magnetism and Electromagnetic Induction

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

NTS 2017
Physics
Atomic Spectra
Elimination Tool:

Two vectors are of magnitude 50 and 31,the resultant might be?

If the volume of a gas is fixed then on increasing its temperature, its pressure______

NTS 2016 SMBBMC
Physics
Heat and Thermodynamics
Elimination Tool:

Earth is a/an frame of reference

) Which can damage eye?

Electric flux Is positive when

Molecules of a gas at constant pressure for a fixed amount of gas have average kinetic energy X. Increasing temperature from 27˚C to 327˚C, the average K.E. of the molecules will become:

NUMS Mock 4
Physics
Heat and Thermodynamics

An apple is thrown with a speed of 30 m/s in a direction 30° above the horizon. Find out its horizontal range. (g= 9.8 m/s2)

NTS 2015 DUHS and JSMU
Physics
Motion in Two Dimensions
Elimination Tool:

Which of the following color has the highest energy?

Which is most sensitive to human eye?

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:

A wave passes through a medium, each particle of the medium performs 100 complete vibrations in 5 seconds. What is the frequency of the wave:

PMC Sample 1
Physics
Wave Motion and Sound
Elimination Tool:

22320 cal heat is supplied to 100g of ice at zero degree centigrade. If the latent heat of fusion of ice is 80 cal /g and latent heat of vaporization of water is 540 cal/g the final amount of water thus obtained and its temperature respectively are:

NUMS 2014
Physics
Heat and Thermodynamics
Elimination Tool:

When fluid is incompressible, it means:

NUMS 2018
Physics
Fluid Dynamics
Elimination Tool:

Simple oscillating circuit consists of?

Value of  ∊ _s is:

When an object is thrown upward, it rises to height h. How high is the object in terms of h, when it has lost ⅓ of its original kinetic energy?:

NTS 2019
Physics
Work, Power and Energy
Elimination Tool:

Minimum velocity needed to put the satellite into orbit is

X-rays are also known as:

NTS 2015 DUHS and JSMU
Physics
Atomic Spectra
Elimination Tool:

Value of Wien’s constant is?

Hooke’s law states that under normal conditions:

NUMS 2019 Cancelled
Physics
Physics of Solids
Elimination Tool:

In multimode step index fibre the refractive index of core and cladding is

If stress is doubled, then volume becomes

For gaining an atomic spectra, an evacuated glass tube is filled with:

NUMS 2020
Physics
Atomic Spectra
Elimination Tool:

Electric potential is a quantity.

There is a current of 25 A in a long straight wire. What is the flux density at a point 3 cm from the wire?

NTS 2016 SMBBMC
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The ratio of wavelength of last line of Balmer series and last line of lymen series is

PMC Sample 2
Physics
Atomic Spectra
Elimination Tool:

A wire is stretched by a force ‘F’ which causes an extension ∆l, the energy stored in the wire is:

UHS 2012
Physics
Physics of Solids
Elimination Tool:

Electrons are emitted in the production of X rays by:

NUMS Mock 1
Physics
Atomic Spectra

An electron is situated midway between two parallel plates 0.5 cm apart. One of the plates is maintained at a potential of 60 volts above the other. The force on the electron is (e = -1.6×10-19)

NTS 2011
Physics
Electrostatics
Elimination Tool:

Two positive point charges Q1 = 16 microCoulombs and Q2 = 4 micro Coulombs are seperated in a line by a distance of 3 meters. Find the spot on the line between the charges where the electric field is zero.

NUMS 2019 Reconduct
Physics
Electrostatics
Elimination Tool:

Two point charges of +5 C and -12 C attract each other with a force of 1.48 N. charge of -5 C is added to each of these charges. Now the force will be:

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Which of the following statement shows that no work is done?

NUMS Mock 4
Physics
Work, Power and Energy

Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will:

NTS 2017
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

A microscope has an objective of 10 mm focal length and an eye piece of 25 mm focal length. What is the distance between the lenses, if the object is in sharp focus when it is 10.5 mm from the objective?

NTS 2014
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

By increasing the area of the plates and decreasing the distance between them, the capacitance of a capacitor:

NUMS 2020
Physics
Electrostatics
Elimination Tool:

A camera of 6-cm focal length is used to photograph a distant scene. The distance from the lens to the image is approximately:

NTS 2016 SMBBMC
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Power factor. of RLC circuit at Resonance Is

The speed of the sound in air is 332 m/s. The speed of sound at 22 degrees centigrade will be:

NUMS Mock 4
Physics
Wave Motion and Sound

A football, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30°. Calculate its total flight time, assuming that air resistance is negligible.

NTS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

Suppose A =4.1, and B= 3.26 and the result from calculator comes to be 1.00876543. What should be the correct number of significant figures In final answer If multiplication and division only?