In full wave rectifier with input frequency 50 Hz the ripple in the output is mainly of frequency

PMC Practice 6
Physics
Electronics
Elimination Tool:

A parallel plate capacitor has a capacitance C. If the distance between the two plates is halved, the capacitance will be?

NUMS Mock 3
Physics
Electrostatics

If capacitor is connected with battery and is fully charged then

There is no noticeable boundary between core and cladding.

Two charges of same magnitude are placed, the force between the charges will be maximum in presence of which medium?

Q.125 SI Unit of current is?

Minimum velocity needed to put the satellite into orbit is

The SI unit for intensity of sound is:

NTS 2015 SMBBMC
Physics
Wave Motion and Sound
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 capacitor and an inductor are connected to A.C. supply. If we double the frequency of A.C. supply then the effect on reactance of capacitor XC and reactance of inductor XL will be:

NUMS 2019 Cancelled
Physics
Electronics
Elimination Tool:

Which of the following statement is true? i) Toroid is a solenoid bent into circular path ii) Solenoid is a tarok’ in open

1 kilowatt hour =

NUMS Mock 2
Physics
Work, Power and Energy

Laser beam can be used to generate three dimensional objects in a process called:

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

A battery has an e.m.f. of 4 V and internal resistance ‘r’. When this battery is connected to an internal resistance of 2 ohms, a current of 1 amp flows in the circuit. How much current will flow if the terminals of the battery are connected directly:-

NTS 2010
Physics
Current Electricity
Elimination Tool:

Third law of Newton is also called:

NUMS 2016
Physics
Forces and Motion
Elimination Tool:

1 femto is equal to

A constant force acting on a body of mass 5 kg changes its speed from 2 /s to 7 m/s in 10 s the direction of motion of the body remains unchanged. Find the magnitude of the force.

NTS 2013
Physics
Forces and Motion
Elimination Tool:

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

NUMS 2017
Physics
Circular Motion and Momentum
Elimination Tool:

the value of permeability

An electric cell of e.m.f E, is connected across a copper wire of diameter d and length L. The drift velocity of electrons in the wire is v0. If the length of the wire is changed to 2L, the new drift velocity of electrons in the copper wire will be:

NUMS 2014
Physics
Current Electricity
Elimination Tool:

A particle is moving in a circle with radius r and velocity v if radius is doubled keeping the velocity constant, the value of tangential acceleration will be:

Magnetic force on a moving charge depends upon:

NTS 2016 SMBBMC
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Simple Harmonic Motion of a body is described by which statements mentioned below:

K : K.E is maximum when displacement x = 0

L : P.E is maximum when x = 0

M : P.E is maximum when x = ± x0

UHS 2018
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

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

NTS 2016 SMBBMC
Physics
Heat and Thermodynamics
Elimination Tool:

The sum of all forms of molecular energies in a thermodynamic system is known as:

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

If u and d represent up quark and down quark respectively then composition of Proton and Neutron can be written as:

NUMS 2019 Cancelled
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:

A 100 kg golf ball is moving to the right with a velocity of 20 m/s. It makes a head on collision with an 8 kg steel ball, initially at rest. The two balls get stuck together. What will the velocity of these two balls after collision?

NTS 2015 DUHS and JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

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

NUMS Mock 2
Physics
Electronics

1 testa is equal to?

The product of frequency and time period is equal to:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

What is 1 radian in degrees approximately

PMC Sample 3
Physics
Measurements
Elimination Tool:

On the ground, the gravitational force on a satellite is W. What is the gravitational force on the satellite when at a height R/50, where R is the radius of the Earth?

NTS 2013
Physics
Gravitation
Elimination Tool:

A pipe open at both ends has a length of 5m. The second harmonic frequency is _____. Velocity of sound in air = 340 m/s.

NUMS Mock 4
Physics
Wave Motion and Sound

What is the instantaneous power dissipated through a resistor of resistance 10 ohm if it is connected to an AC source of frequency 15 Hz at 1/180 sec if peak value is 20 V?

UHS 2018
Physics
Alternating Current
Elimination Tool:

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

What will be the Impedance for V = 10 sin(wt) and I = 20 sln(wt)

Which of the following have low ionization and high penetrating power?

the period of rotation of geosynchronous satellite is

A proton Is moving in direction of negative x-axis, what will happen to it if potential difference of V = -10x + 7 is applied across the field.

A spring is moving with SUM from X=10 cm to X=40 cm then it has maximum velocity at?

In which of the following the pn Junction is used?

If M and m represent the mass of Earth and mass of a satellite respectively; then the orbital speed v of satellite in a circular orbit of radius r around Earth will be:

NUMS 2019 Cancelled
Physics
Gravitation
Elimination Tool:

A block of mass 50 kg is pulled on a frictionless floor by a force of 210 N directed at 30 degrees to the horizontal. If the block moves 3.0 m, what is the work done on it by the applied force?

NTS 2013
Physics
Forces and Motion
Elimination Tool:

The detection and estimation of an element in a mixture is sometimes nearly impossible, if it is present in very minute traces or if it’s chemical properties are very similar to those of other elements in the mixture. An effective technique is developed for these purposes is known as?

NTS 2014
Physics
Nuclear Physics
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

A stone of mass 2.0 kg is dropped from a rest position 5.0 m above the ground. What is its velocity at a height of 3.0 m above the ground?

NUMS Mock 1
Physics
Forces and Motion

Resistance of RCL series circuit at resonance Is?

In hot day white clothes are worn because they are good

In rotation motion the torque is:

Wavelength of X-rays is of the order of?

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:

Consider the following examples of motion:

I. The daily motion of the earth about its own axis

II. The motion of planets around the sun

III. Sugar cane crushing machine is run by a camel that moves in a circular path around the machine.

IV. Rotation of flywheel about its axle.

Which of the following Is correct?

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

The half-life of a radioactive element depends upon:

NUMS Mock 4
Physics
Nuclear Physics

The electron volt is the unit of __________.

PMC Practice 3
Physics
Electronics
Elimination Tool:

Capacitance increases by

For projectile motion, in the absence of air resistance:

NUMS Mock 1
Physics
Motion in Two Dimensions

A rescue helicopter drops a package of emergency ration to a stranded party on the ground. If the helicopter is traveling at 40 m/s at a height of 100 m above the ground, where does the package strike the ground relative to the point at which it was released? (g= 9.8 m/s2)

NTS 2010
Physics
Motion in Two Dimensions
Elimination Tool:

A shot leaves a gun at the rate of 160m/s. Calculate the greatest distance to which it could be projected and the height to which it would rise: (g=10 m/s2)

NTS 2010
Physics
Motion in Two Dimensions
Elimination Tool:

If a voltage of 9V is applied between ends of a wire whose resistance is 0.2 ohm, what will be the resulting current?

NTS 2015 SMBBMC
Physics
Current Electricity
Elimination Tool:

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:

The sum of all forms of molecular energies (Kinetic and Potential) of a substance is termed as?

UHS 2019
Physics
Work, Power and Energy
Elimination Tool:

A ball is thrown vertically upward with a velocity of 98 m/s. How long does it take to reach its highest point?

NTS 2016 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

Vector components In space are

In motion of satellites, necessary centripetal force is provided by:

NUMS 2020
Physics
Circular Motion and Momentum
Elimination Tool:

If a force of 1 N acts on a body through a distance of 1 m in the direction of force, how much
work is done?

The frequency of AC used in Pakistan is

A force F = 0.12 N is applied on a spring and the spring elongates by 3 cm. The specific constant of the spring is?

NUMS Mock 2
Physics
Oscillations and Simple Harmonic Motion

During the process of nuclear disintegration, when alpha particle emission occurs, atomic no. of the atom changes by _____ and its mass number changes by _____.

NTS 2016 DUHS & JSMU
Physics
Nuclear Physics
Elimination Tool:

Polarization of light shows that it is:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

In which of the following scenarios will the K.E be zero?

The dimensions of momentum are the same as that of:

PMC 2021 Tested
Physics
Forces and Motion
Measurements
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:

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:

Mass of a body with speed of light approaches to:

Whenever the average and instantaneous velocities are equal the body is said to have a:

NTS 2016 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

Terminal voltage Vi of the battery is greater than emf of the battery when:

NUMS 2020
Physics
Current Electricity
Elimination Tool:

Whenever the average and instantaneous velocities are equal the body is said to have a:

NTS 2016 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

A balloon Is going upwards with a velocity 12 m/s. it releases a packet when it is at a height of 65 from ground. flow much time the packet will take to reach the ground if g=10 m/s^2?

If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to
suffer form

What is the constant of proportionality in ohms law:

Absolute zero is equivalent to:

NUMS Mock 2
Physics
Heat and Thermodynamics

Physics is an experimental science which depends heavily on:

NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
Elimination Tool:

Velocity is a:

PMC Practice 3
Physics
Scalars and Vectors
Elimination Tool:

A body moving with velocity V can be stopped by a force F in direction of it. The same body moving with velocity 5 V can be stopped by a force 5F in distance equal to:

NUMS 2017
Physics
Forces and Motion
Elimination Tool:

A half wave rectifier is operating from 50 Hz mains, fundamental frequency of ripple will be

PMC Sample 3
Physics
Alternating Current
Elimination Tool:

Identify the example/s of Static Equilibrium:

I. A book lying on a horizontal table
II. A building
III. A bridge

NTS 2012
Physics
Forces and Motion
Elimination Tool:

Length of the telescope is:

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