The output voltage of a rectifier is:

PMC Practice 4
Physics
Alternating Current
Elimination Tool:

Is it possible to separate north pole only from bar magnet?

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

Which of the following will be absorbed by the paper?

During the production of x-rays, the cathode and anode are enclosed inside an evacuated glass chamber and a high DC voltage of the order of:

NUMS 2020
Physics
Atomic Spectra
Elimination Tool:

Two capacitors C1 = 3 uF and C2 = 6 uF are in series across a 90 volts D.C. supply. The total capacitance is given by:

NTS 2012
Physics
Electrostatics
Elimination Tool:

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

NUMS 2015
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

If a wire having current 10A has a 3T magnetic field, what will be the magnetic field at a point from the wire at double the distance?

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

If length of a pendulum is 4 times g,.its time period will be:

• Q.75 Velocity is a

if v is the velocity of an object, then the following equation is always:

[1-v²/c²]^-0.25

If a substance can undergo plastic deformation, until it breaks, it is:

NUMS 2016
Physics
Physics of Solids
Elimination Tool:

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:

If mass attached to a spring and the spring constant of a spring are doubled, the resulting Time period will:

1 degree Is equal to radians

What is the angle made by the vector -i-5j with x-axis?

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 2019 Cancelled
Physics
Physics of Solids
Elimination Tool:

The unit of the product of RC in the charging of a capacitor Is:

What is correct about alpha and x rays?

An electric rod of 2000 watts rating boils a certain quantity of water in 10 minutes, the heat which generated for boiling this water is:

NTS 2013
Physics
Electrostatics
Elimination Tool:

Compton shift is maximum at:

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

Spherical aberration can be reduced by using

In the case of linear deformation, the ratio of tensile stress to tensile strain is called:

UHS 2018
Physics
Physics of Solids
Oscillations and Simple Harmonic Motion
Elimination Tool:

If a Force F of magnitude 5N makes an angle of 60 with x-axis, the x-component of the vector will
be:

A nucleus consists of 11 protons and 12 neutrons. The conventional symbol of nucleus is:

NTS 2011
Physics
Nuclear Physics
Elimination Tool:

What is the dimension of magnetic field

An object is dropped from the top of the building. If it takes 10 seconds to hit the ground, what is the height of the building?

NTS 2015 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

Black body emits which of the following radiations:

Which list shows electromagnetic waves in order of increasing frequency?

ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:

Charge on an up-quark is:

Magnetic effect of electric current was first discovered by

A current carrying conductor is lying perpendicular to magnetic field and experiencing some force. If the conductor rotates by 60 degrees counter clock wise, the force on it will

Half-life of iodine-131 is 8 days. If 20mg is present initially. How much iodine is left behind after 2 half-lives?

NUMS 2020
Physics
Nuclear Physics
Elimination Tool:

If f1 and f2 are frequencies of two tuning forks, such that f1 < f2, then number of beats produced in one second are: PMC Sample 2 Physics Oscillations and Simple Harmonic Motion Elimination Tool:

The motion of particle executing SUM is given by x = 0.01 sin 100 π t, where x is in meter and time is in second. The time period is

For a simple harmonic motion the acceleration of the body is _______ to displacement and always directed towards ________.

NUMS Mock 2
Physics
Oscillations and Simple Harmonic Motion

A red colored cloth red light

An object is thrown vertically upward with a velocity of 20 m/s. How much time it will take to reach the highest point?

NUMS 2017
Physics
Motion in Two Dimensions
Elimination Tool:

The brightness spot on the screen in the CRO is controlled by:

Alpha rays are nuclear radiations. They are in fact same as _____ nuclei.

NUMS 2018
Physics
Nuclear Physics
Elimination Tool:

Two springs fixed at one end are stretched by 5 cm and 10 cm respectively when masses 0.5 kg and 1 kg are suspended at their lower ends. When displaced slightly from their mean positions and released, they will oscillate with time periods in the ratio:

NTS 2017
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

If a compressible medium has bulk modulus denoted by B and density denoted by P, then a Newton’s formula for the speed of sound in a medium is _____.

NTS 2019
Physics
Wave Motion and Sound
Elimination Tool:

In rotational motion, angular momentum plays a role which is analogous to that played by _____ in linear motion.

NUMS Mock 3
Physics
Circular Motion and Momentum

SI unit of velocity Is

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:

4.5 x 109 years is the half-life of:

NUMS 2020
Physics
Nuclear Physics
Elimination Tool:

What Is absolute uncertainty In length of 10m measured by scale of precision of 0.1m?

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:

Aluminum Is a

What is the unit of angular momentum

The electron shows purely a ____ when free.

PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:

The newton-second is the unit of:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

Radiations emitted by human body lie in which of the following series?

A spring in SHM oscillates between -A and A with time period T. If the spring starts from mean position and moves towards A, at what time will it be at a distance of A/2 from the mean position?

In a coil, when current changes from 10 A to 4 A in 1 s. An induced emf of 1.2 V is induced across the coil. The self – inductance of the coil is:

NUMS 2019 Cancelled
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Siemen is the SI unit of:

When the aircraft Concorde is moving in a horizontal plane at a constant speed of 650 ms-1, its turning circle has a radius of 80 km. What is the ratio of the centripetal force to the weight of the aircraft? (g = 9.8 m/s2)

NTS 2013
Physics
Circular Motion and Momentum
Elimination Tool:

All of the following is/are scalar quantities except:

NTS 2011
Physics
Scalars and Vectors
Elimination Tool:

A battery whose emf is 40 V has an internal resistance of 5 Ohms. If this battery is connected to a 15 Ohms resistor ‘R’, what will be the voltage drop across ‘R’:

NTS 2010
Physics
Current Electricity
Elimination Tool:

A guy is standing in a lift falling freely under gravity and releases a ball from hand. As seen by the ball, the boy:

NUMS 2017
Physics
Gravitation
Elimination Tool:

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:

When an electron jumps from outer to 5th orbit, then the spectral lines fall into region.

The moment of inertia of a solid sphere of mass ‘m’ having radius ‘r’ about a line passing through its center is:

NUMS Mock 2
Physics
Circular Motion and Momentum

Which of the following phenomenon proves that light waves are transverse waves?

NUMS Mock 1
Physics
Electromagnetic Waves

Which of the following is the percentage of the original quantity of a radioactive material left after five half–lives approximately.

NUMS Mock 2
Physics
Nuclear Physics

Which of the following statements is not true regarding the Newton’s third law of motion?

NUMS 2016
Physics
Forces and Motion
Elimination Tool:

A particle moves from position r = 3i+2j-6k to r = 14i+13j+9k under the action of a Force F = 8i+2j+6k. Find the work done
by the force:

NTS 2010
Physics
Scalars and Vectors
Elimination Tool:

How can we define linear magnification produced by a lens?

NTS 2015 SMBBMC
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Why picture on a TV screen become distorted when a magnet is brought near the screen?

NUMS Mock 2
Physics
Magnetism and Electromagnetic Induction

Which gas is not used in GM counter?

Why is the total mass of all individual protons and neutrons in a nucleus greater than the mass of the nucleus which they constitute?

NUMS Mock 2
Physics
Nuclear Physics

Alpha particle has

_______ is a device which makes use of mutual induction for stepping up or down an alternating e.m.f.

NTS 2012
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Radiation cause damage in a)

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

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

If the temperature of cold reservoir is 12C and that of hot reservoir is 27C, the efficiency of Carnet Engine • All be?

SI unit of acceleration is

The ratio of angular speed of moon around the Earth to its angular speed about its own axis is:

NUMS Mock 3
Physics
Circular Motion and Momentum

Light signals passes through multimode graded fibre due to

A bullet of mass 20g leaves the gun with a velocity of 200 m/s. If the mass of gun is 2kg then the speed of recoil of the gun is:

NUMS 2019 Cancelled
Physics
Forces and Motion
Elimination Tool:

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

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

Why is the total mass of all individual protons and neutrons in a nucleus greater than the mass of the nucleus which they constitute?

NUMS 2020
Physics
Nuclear Physics
Elimination Tool:

A shock wave is produced due to an earthquake which makes the buildings move in the direction of the shock wave. Which progressive wave would this be?

NUMS Mock 3
Physics
Wave Motion and Sound

During radioactive decay of a nucleus zXA, β emission takes place along with the daughter nucleus. Because of this beta particle emission, the mass number (A) of the parent nucleus:

NTS 2018
Physics
Nuclear Physics
Elimination Tool:

If an object sinks in the water, then

A simple pendulum completes one oscillation in 4 seconds. Calculate its length when g= 9.8 m/s2, as the time period of a simple pendulum is given by T = 2 π √(l/g)

NTS 2015 DUHS and JSMU
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

______ is defined as the sensation that sound produces in the ear of a listener and is clearly related to the frequency of sound. Frequency and ______ are both measured in Hertz (Hz). Thus greater the frequency the greater the _____ and lower the frequency lower the _______.

NTS 2017
Physics
Wave Motion and Sound
Elimination Tool:

When speed is doubled the centripetal force will be?

Calculate the frequency if the number of revolutions is 300 and the paired poles are 50.

PMC Practice 6
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

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:

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:

Vector components In space are

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:

A thin horizontal plate of area 0.036 m2 is beneath the surface of a liquid of density 930 kg m−3. The force on one side of the plate due to the pressure of the liquid is 290 N. What is the depth of the plate beneath the surface of the liquid?

ETEA 2018
Physics
Fluid Dynamics
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: