A box of mass m = 6 kg slides with speed v = 4 m/s across a frictionless floor. It suddenly explodes into two pieces. One-piece, with mass m1= 2 kg moves in the same direction with speed v1= 8 m/s . Find the velocity of the second piece.

NTS 2013
Physics
Motion in Two Dimensions
Elimination Tool:

Which device is used to measure the potential difference between two points of a conductor in the laboratory?

NUMS 2020
Physics
Current Electricity
Elimination Tool:

Hooke’s law states that under normal conditions:

NUMS 2019 Cancelled
Physics
Physics of Solids
Elimination Tool:

Sky appears blue due to?

All of the following is/are scalar quantities except:

NTS 2011
Physics
Scalars and Vectors
Elimination Tool:

The force which will accelerate a 25 kg mass at 98 cm/s2 on a smooth horizontal plane is:

NTS 2016 SMBBMC
Physics
Forces and Motion
Elimination Tool:

The energy supplied by the cell to the charge carriers is derived from the conversion of:

NUMS Mock 1
Physics
Current Electricity

A square coil of 16 cm has 200 turns and rotates in a uniform magnetic field of magnitude 0.05 T. If the peak emf is 12 V, what is the angular velocity of the coil?

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

Which of the following can cause least Ionization but has high Penetrating Power?

One kilowatt – hour is equivalent to a factor ____ in Joules.

NTS 2016 DUHS & JSMU
Physics
Work, Power and Energy
Elimination Tool:

An object with an initial velocity of 4m/s moves along a straight axis under constant acceleration. Three seconds later,its velocity is 14m/s. How far did it travel during this time?

NTS 2015 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

_____ are such nuclei of an element that have the same mass number A, but have different charge number Z.

PMC Practice 4
Physics
Atomic Spectra
Elimination Tool:

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

Work done, due to centripetal force, for circular motion will be:

NUMS Mock 1
Physics
Circular Motion and Momentum

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:

A torold is?  l• A circular ring shape of a coil. II- A solenoid bent In shape of a circle. a) I only b) II only

When a certain metal surface is illuminated with light of frequency v. the stopping potential for photoelectric current is V0. When the same surface is illuminated by light of frequency V/2, the stopping potential is VO-/4. The threshold frequency for photoelectric emission is:

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

A parallel beam of white light is incident normally on a diffraction grating. It is noted that the second-order and third-order spectra partially overlap. Which wavelength in the third-order spectrum appears at the same angle as the wavelength of 600 nm in the second-order spectrum?

NTS 2013
Physics
Optics, Nature of Light and Optical Instruments
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?

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

The resultant of two forces has magnitude of 20N . if one of the forces is of magnitude 20√3 N and makes an angle of 30o with the resultant then, the other forces must be of magnitude:

NTS 2015 DUHS and JSMU
Physics
Scalars and Vectors
Elimination Tool:

Third law of Newton is also called:

NUMS Mock 2
Physics
Forces and Motion

A body moving on a fluid will experience:

NUMS 2016
Physics
Fluid Dynamics
Elimination Tool:

Debroglie wavelength for an electron and proton moving at same speed are L and 1; respectively. And frequencies are Fe and Fp respectively. Which of the following is corrract.

The food we eat in one day has about the same energy as:

NUMS 2020
Physics
Work, Power and Energy
Elimination Tool:

X rays are affected by:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

When the antinodes, in stationary waves, are passing through their equilibrium position, the energy is:

NUMS Mock 2
Physics
Wave Motion and Sound

Electric field strength of a point charge is E and electric potential is V, at a distance ‘r’ from the point charge. What is the electric potential at a point for the same point charge where electric field strength is E/4?

UHS 2019
Physics
Electrostatics
Elimination Tool:

In which of the following medium will the speed of sound be maximum?

To remove the huge amount of heat energy in a nuclear reactor, ______ is/are used.

NTS 2012
Physics
Nuclear Physics
Elimination Tool:

in an organ pipe if one side is closed, then it is proved that harmonics released will be

A cathode ray oscilloscope is displaying an AC signal. If one wave is completed in 2 cm along X- axis and time-base setting is 10 ms/cm, then frequency of AC signal will be:

NUMS Mock 4
Physics
Wave Motion and Sound

The main difference between X rays and Y rays is:

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

Conversion of heat energy completely into work violates:

NUMS 2014
Physics
Heat and Thermodynamics
Elimination Tool:

The diameter of a lens is called

If length of the pendulum is halved time ‘period will be?

The direction of the magnetic line of force depends upon:

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The photocell is similar to:

PMC Practice 5
Physics
Dawn of Modern Physics
Elimination Tool:

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1kV, its kinetic energy will be:

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

What is the unit of angular momentum

A man throws a ball vertically upward in the compartment of an accelerated train. The ball will fall:

NUMS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

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

When the antinodes, in stationary waves, are passing through their equilibrium position, the energy is:

NUMS 2020
Physics
Wave Motion and Sound
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

An object having spherical shape of radius ‘r’ experiences a retarding force F from a fluid of coefficient of viscosity ‘η’ when moving through the fluid with speed ‘v’. What is the ratio of retarding force to speed?

UHS 2011
Physics
Fluid Dynamics
Elimination Tool:

One complete circle is equal to:

NUMS 2020
Physics
Circular Motion and Momentum
Elimination Tool:

The output voltage of a rectifier is:

PMC Practice 4
Physics
Alternating Current
Elimination Tool:

When wood is replaced by air as dielectric. The capacitance of capacitor

If the velocity v being a vector quantity is multiplied to scaler quantity mass, the result will be:

A steady current of 5 A is drawn from an electric source at a voltage of 100 V. The power consumed (in Watts) is:

NUMS 2018
Physics
Current Electricity
Elimination Tool:

The unit of impulse is same as of

What Is the power of a body if 1 N force is acted upon a body have a constant velocity of 10ms-1?

Law of heat exchange is used to determine:

NTS 2018
Physics
Heat and Thermodynamics
Elimination Tool:

For a stiff spring, the value of spring constant is:

NUMS Mock 1
Physics
Oscillations and Simple Harmonic Motion

The Bohr’s postulate for stationary orbits of Hydrogen atoms _____. Here m is the mass of the electron, v velocity, r orbital, and h is Planck’s constant.

NTS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

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

NUMS 2015
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

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

In E = aT4  E stands for??

The ripple factor of a half-wave rectifier is:

PMC Practice 2
Physics
Alternating Current
Elimination Tool:

Two bodies X of mass 4kg  and Y of mass 6 kg have same linear momentum. If the kinetic energy of Y is 48 J then kinetic energy of body X is:

Which of the following statements is not consistent with Bohr’s set of postulates regarding the hydrogen atom model with regard to the emission and absorption of light?

NTS 2013
Physics
Atomic Spectra
Elimination Tool:

What’s relation between penetrating power and Ionization power

To get a peak load voltage of 40V out of a bridge rectifier, what should be the approximate rms value of secondary voltage?

PMC Practice 5
Physics
Electronics
Elimination Tool:

Longitudinal standing wave, in second harmonic mode, is established in a tube that is open at both ends. The length of the tube is 0.8m. What is the wavelength of the waves that make up the standing wave?

PMC Practice 10
Physics
Electromagnetic Waves
Elimination Tool:

Weight Is equivalent to which of the following

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:

Vector components In space are

Branch of physics which deals with sub atomic particles.

Find the heat transferred to or from the system when a thermodynamics system undergoes a process in which its internal energy decreases by 300 J. If at the same time, 120 J of work is done on the system.

NTS 2016 DUHS & JSMU
Physics
Heat and Thermodynamics
Elimination Tool:

When interference between thin films occurs, the path difference between two interfering rays is 2t. If ‘n’ is the refractive index of the medium, the bright circles are obtained when ________ with m = 0, 1, 2, 3, …

NUMS 2019 Reconduct
Physics
Electromagnetic Waves
Elimination Tool:

Who proposed matter waves?

The frequency of a man’s voice is 300 Hz. If velocity of sound is 336 m/s, the wavelength of the sound is:

NTS 2016 SMBBMC
Physics
Wave Motion and Sound
Elimination Tool:

Planck’s constant is analogous to:

PMC Practice 6
Physics
Dawn of Modern Physics
Elimination Tool:

The potential difference between the terminals of a battery in an open circuit is 2.2 V. When it is connected across a resistance of 5.0 Ω, the potential falls to 1.8 V. What is the internal resistance of the battery?

NTS 2015 DUHS and JSMU
Physics
Current Electricity
Elimination Tool:

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

NTS 2011
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

A wire of resistance R is bent in the form of a circle the resistance between two points on the circumference of the wire and at the end of the diameter of circle is

NUMS 2019 Reconduct
Physics
Current Electricity
Elimination Tool:

Electric potential is a quantity.

If a face acts on a body for 2 sec and its rate of change of momentum is 50, the force acting on the body is:

Two charges are separated by a distance r, in presence of which of the following the force between them will be minimum?

A and B are bulbs connected in series with 40-volt battery and a bulb C is connected with 40-volt battery Glow of bulbs will be:

Two vectors S and R are such that S= 4, R= 6 and S.R= 13.5. Find the angle between S and R.

NTS 2015 SMBBMC
Physics
Scalars and Vectors
Elimination Tool:

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

NUMS 2017
Physics
Nuclear Physics
Elimination Tool:

If y-component of a force acting In y direction is 6N the x-component will be

There are initially 400 atoms in a radioactive sample. What would be the number of atoms after 3 half – life?

PMC 2020
Physics
Nuclear Physics
Elimination Tool:

If the spring is halved, the new spring constant of each part will be:

A type of metals containing alloys, ceramics etc., when heated their temperature reaches to a state called Transition temperature state and their resistance reaches to zero. These types of metals are called:

The current measuring part of the Avometer consists of a number of low resistors connected …

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

“At constant pressure, the volume of gas is directly proportional to Absolute Temperature” this is known as?

NTS 2015 SMBBMC
Physics
Heat and Thermodynamics
Elimination Tool:

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

PMC 2020
Physics
Electrostatics
Elimination Tool:

A wire of resistance R is bent in the form of a circle the resistance between two points on the circumference of the wire and at the end of the diameter of circle is

NUMS Mock 4
Physics
Current Electricity

The difference between soft and hard X-rays is of:

NUMS Mock 1
Physics
Atomic Structure

Unit of Momentum Is?

The energy supplied by the cell to the charge carriers is derived from the conversion of:

NUMS 2016
Physics
Electrostatics
Elimination Tool:

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