In Young’s Experiment, the central spot In Interference pattern is

Density of blood is:

NUMS 2016
Physics
Fluid Dynamics
Elimination Tool:

A neutron travels a distance of 24 m in a time interval of 3.6 x 10^-4 s. Assuming its speed was constant. Find its kinetic energy. Take 1.7 x 10^-27 kg as the mass of the neutron.

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

In a bridge type full-wave rectifier, if Vm is the peak voltage across the secondary coil of the transformer, the maximum voltage coming across each reverse biased diode is:

PMC Practice 5
Physics
Alternating Current
Elimination Tool:

Orange light in a vacuum has a wavelength of 600 nm. What is the frequency of this light?

ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:

If the direction of current in two parallel wires is In opposite direction, then the wires will:

One wheel has a diameter of 30 inches and a second wheel has a diameter of 20 inches. The first wheel travels a certain distance revolution in 240 revolutions. In how many revolutions did the second wheel travel the same distance.

NUMS 2017
Physics
Circular Motion and Momentum
Elimination Tool:

Lasers are used for producing an intense, ____ and coherent beam of visible light.

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

Which measure Is nearest to your height?

Unit of electric field is:

A mass of 20 kg is lifted from the floor to a height of 2m in 4.9 sec. Calculate the power in Watts.

NUMS 2019 Reconduct
Physics
Work, Power and Energy
Elimination Tool:

The phenomena in which certain metals emit electrons when exposed to high-frequency light is known as?

NTS 2014
Physics
Dawn of Modern Physics
Elimination Tool:

Newton’s first law Is applicable on:

I) Body In motion II) Body In rest

If a wave can be polarized, it means, it is:

NUMS Mock 4
Physics
Wave Motion and Sound

Frequency of a travelling wave is 2000 Hz. Its speed is 300m/s. What is its wavelength?

PMC Sample 1
Physics
Wave Motion and Sound
Elimination Tool:

The process of combining low frequency waves with high frequency is called:

The energy stored inside a capacitor is given by the relation:

NUMS Mock 3
Physics
Electrostatics

1 femto is equal to

The laws of motion show the relation between

The viscous drag on small spherical body (moving with slow speed v) is propotional to

ETEA 2019
Physics
Fluid Dynamics
Elimination Tool:

What happens to the pressure ‘p’ of an ideal gas, if the temperature is increased by a factor of 2 and the volume is increased by a factor of 8?

NUMS Mock 1
Physics
Heat and Thermodynamics

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

The electron current is chiefly due to:

NUMS 2016
Physics
Wave Motion and Sound
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:

The stopping potential depends on

A body is moving in a circle at constant speed. Which statement is true?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

If a wave can be polarized, it means, it is:

NUMS 2016
Physics
Wave Motion and Sound
Elimination Tool:

If a single convex lens is placed close to the eye, it can be used as a

Semiconductors have conductivity of the order

A bicycle wheel of radius 0.70 m is turning at an angular speed of 6.3 rad/s as it rolls on a horizontal surface without slipping. What is the linear speed of the wheel?

An alternating voltage source is connected to a resistor R, and a capacitor C, then which of the following statements about phase angle between voltage V and current I is correct?

NUMS 2019 Cancelled
Physics
Alternating Current
Elimination Tool:

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:

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:

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

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

The temperature of a body at 100 °C is increased by Δ? as measured on the Celsius scale. How is this temperature change expressed on the Kelvin scale?

NTS 2013
Physics
Heat and Thermodynamics
Elimination Tool:

The third law of motion given by Newton deals with an action- reaction pair of forces.

Consider two bodies: if the action is due to one body, the reaction will be due to:

NTS 2016 SMBBMC
Physics
Forces and Motion
Elimination Tool:

If the ionization energy of a hydrogen atom is 13.6 eV, its ionization potential will be:

PMC Sample 1
Physics
Atomic Spectra
Elimination Tool:

A neutron collides with a stationary proton at rest. After collision

A particle of mass 5 mg moves with a speed of 8 m/s. Calculate its de Broglie wavelength (h = 6.63 x 10-34 Js)

NTS 2015 DUHS and JSMU
Physics
Atomic Spectra
Elimination Tool:

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

NUMS 2020
Physics
Forces and Motion
Elimination Tool:

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

NUMS Mock 2
Physics
Atomic Spectra

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

NTS 2016 DUHS & JSMU
Physics
Work, Power and Energy
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 Mock 4
Physics
Gravitation

If A and B arc two vectors, area of parallelogram formed by these vectors will be?

1. a) AB b) A . c) AB cos 0                      d) lAx131

Two parallel straight conductors, in which current is flowing in the same direction, attract each other. The cause of it is:

PMC 2020
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

In a ripple tank, 40 waves pass through a certain point in 1 second. If the wavelength of the wave is 5 cm, then speed of the wave is:

PMC 2020
Physics
Wave Motion and Sound
Elimination Tool:

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:

Transistors can be used as:

PMC Practice 10
Physics
Electronics
Elimination Tool:

Escape velocity of moon is

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)

NUMS Mock 1
Physics
Forces and Motion

Who proposed matter waves?

An electron is moving along the axis of a solenoid carrying a current. Which of the following is a correct statement about the electromagnetic force acting on the electron?

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The time period of a wave is 1/4 sec. How long does it take 20 complete waves to pass a point?

PMC Sample 1
Physics
Wave Motion and Sound
Elimination Tool:

Instantaneous velocity is defined as

PMC Sample 3
Physics
Motion in Two Dimensions
Elimination Tool:

A handball is tossed vertically upward with a velocity of 19.6 m/s. Approximately how high will it rise?

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

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:

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

NUMS 2016
Physics
Physics of Solids
Elimination Tool:

The density of blood is:

UHS 2011
Physics
Fluid Dynamics
Elimination Tool:

The region that lies between IR and UV regions is called:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

Who was awarded Nobel Prize (1921) for explanation of Photoelectric Effect?

Which one of the following physical quantity does not the dimension of force per unit area

ETEA 2019
Physics
Measurements
Elimination Tool:

As a result of the natural process the entropy

A microscope has an objective of 10 mm focal length and eyepiece 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 2015 DUHS and JSMU
Physics
Optics, Nature of Light and Optical Instruments
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:

If a wire of resistance R is stretched into double of its length, then it’s resistance becomes _________.

NUMS 2019 Reconduct
Physics
Current Electricity
Elimination Tool:

The use of a capacitor filter in a rectifier circuit gives satisfactory performance only when the load:

PMC Practice 3
Physics
Alternating Current
Elimination Tool:

The velocity of X rays is equal to that of:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

The rapid escape of air from a burst tyre is an example of:

NUMS 2020
Physics
Heat and Thermodynamics
Elimination Tool:

An aircraft of wingspan 50 m flies horizontally at an area where the vertical component of the Earth’s magnetic field is 2.0 x 10-5T.

In order to produce an emf of 1 volt between the aircraft’s wingtips, its speed should be:

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

Capacitors store

An emf of 120 volts of negligible internal resistance is connected across a resistance of 1000 ohm. The current flowing through the circuit will be:

NUMS 2015
Physics
Current Electricity
Elimination Tool:

Absolute zero is equivalent to:

NUMS Mock 2
Physics
Heat and Thermodynamics

A coil of 600 turns is threaded by a flux of 8×10-5 webers if this flux is reduced to 3×10-5 webers in 0.015 seconds. The average induced e.m.f. is:

NTS 2011
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Two resistors R1 and R2 may be connected either in series or in parallel across a battery of zero internal resistance. It is required that the joule heating for parallel combination be five times that for series combination. If R1 = 100Ω, find possible values of R2.

NTS 2013
Physics
Current Electricity
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 2019 Reconduct
Physics
Wave Motion and Sound
Elimination Tool:

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:

A body is executing simple harmonic motion if:

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

Monochromatic light means the light having:

NUMS 2018
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

When the force and the displacement are in the opposite directions, the work done by the force is ______.

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

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:

A hydrogen atom in its ground state absorbs 10.2 eV of energy. What is the orbital angular momentum is increased by?

PMC Sample 3
Physics
Atomic Spectra
Elimination Tool:

Which of the following is not major application of electromagnetic induction

Young modulus for the perfectly rigid body is

1 Inch = —- cm

When a transformer is connected to 120-volt ac, it supplies 3000 V to a device. The current through the secondary winding then is o.06 A and the current through the primary is 2 A. The number of turns in the primary winding is 400. The number of turns in the secondary winding is:

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

Dimension of Torque Is?

Equation of continuity is expressed as:

NUMS 2018
Physics
Fluid Dynamics
Elimination Tool:

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

NUMS 2016
Physics
Forces and Motion
Elimination Tool:

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

From the given options, which one lists the amount of work done from smallest to Largest displacement is In forward direction?

If the velocity of particle is varying linearly with time then shape of d-t curve would be

PMC Sample 2
Physics
Motion in Two Dimensions
Elimination Tool:

A vibrator produces 25 waves in 5 seconds. What is its time period?

Black body radiations were first observed by: