The expression dp/dt represents

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:

Density of blood is:

NUMS 2016
Physics
Fluid Dynamics
Elimination Tool:

The domestic electricity supply has a frequency of:

PMC 2020
Physics
Current Electricity
Elimination Tool:

the period of rotation of geosynchronous satellite is

Reactance of an Inductor Is given by:

Which of the following best describes the magnetic field lines created by a long, straight, current-carrying wire?

NUMS Mock 3
Physics
Magnetism and Electromagnetic Induction

When a body is falling under the action of gravity the direction of acceleration is:

Laws of motion describes?

The efficiency of the carnot’s Engine Working between 150°C and 50°C is:

NTS 2011
Physics
Heat and Thermodynamics
Elimination Tool:

A D.C generator is converted in A.C generator by

The electrical signals change into light signals for transmission through optical fibre. A light pulse
represent.

The ripple factor of half-wave rectifier is?

PMC Practice 14
Physics
Electronics
Elimination Tool:

Polarization of light shows that it is:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

In photo-emission from a metal, if light of λ is replaced by light of wavelength λ / 4 , the maximum kinetic energy of the photoelectrons.

NUMS Mock 1
Physics
Dawn of Modern Physics

In Young’s Double slit experiment, if the spacing between the slit is doubled and the linear distance from the screen is reduced to one half then the spacing between the two adjacent bright fringes will be ____ of actual value.

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

If the time period of the oscillation is 20 micro-sec, then what will be the frequency of that oscillating body?

UHS 2018
Physics
Oscillations and Simple Harmonic Motion
Wave Motion and Sound
Elimination Tool:

Product of Force and Time Is

Red light is used in photographic dark room because of:

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

A container is divided into two equal portions. One portion contains an ideal gas at pressure P and temperature T while the other portion is a perfect vacuum. If a hole is opened between two portions:

NUMS Mock 3
Physics
Heat and Thermodynamics

Dispersional effect may produced error in light signals. This type of error is minimum in.

The stress-strain graph, deduced the following limits successively:

UHS 2013
Physics
Physics of Solids
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:

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:

Alternating Current Generators use:

PMC Practice 5
Physics
Alternating Current
Elimination Tool:

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

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

PMC Sample 3
Physics
Alternating Current
Elimination Tool:

Human body emits which of the following radiation?

A red colored cloth red light

If a half wave rectifier is used to convert 50Hz AC into DC, then the number of pulses present in rectified voltage is:

PMC Sample 1
Physics
Alternating Current
Elimination Tool:

Alpha scattering experiment was conducted In which year? •

Technique for detecting the pressure of objects under water by acoustical echo is called:

NUMS 2018
Physics
Wave Motion and Sound
Elimination Tool:

Which two or more of the following actions would increase the energy stored in a parallel plate capacitor when a constant potential difference is applied across the plates:

PMC Practice 5
Physics
Electronics
Elimination Tool:

Which of the following rectifier uses a wheatstone bridge to rectify signals?

PMC Practice 13
Physics
Electronics
Elimination Tool:

Escape velocity of Jupiter is:

Which series is emitted when electron Jumps from a higher orbit to fifth orbit?

When brakes of a car are applied, angular velocity of a flywheel reduces from 900 cycle / min to 720 cycle / min in 6 sec. Angular retardation is:

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

In a Young’s double-slit experiment, fringes are very close to each other. How can we increase the distance between fringes?

PMC Practice 1
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

In Heisenberg Principle:

On doubling the mass, the linear momentum and angular momentum of the body will be:

A coil is placed near a magnet. Emf will be induced in it when

Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?

NTS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

A force of 10 N is acting on an object at angle of 120 degree through the distance of 4 m. Calculate the work done.

1. a) – 20 j b) 20 /

Michelson measured the length of a standard meter in terms of the wavelength of:

PMC Practice 2
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

The branch of Physics in which we study the properties of light and its applications on optical instruments is called?

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

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

Initial velocity of the object with which it goes out of the Earth’s gravitational field, is called:

NUMS 2020
Physics
Gravitation
Elimination Tool:

An ammeter reads up to 1 A. Its internal resistance is 0.81 Ω. To increase the range to 10 A, the value of the required shunt is:

NTS 2012
Physics
Current Electricity
Elimination Tool:

When the source moves towards an observer the frequency of waves as perceived by observer:

If we double the separation between two charges then coulomb’s force will become?

NUMS 2020
Physics
Electrostatics
Elimination Tool:

The unit of impulse is same as of

A photosensitive material would emit electrons if it is excited by a photon beyond a threshold. To cross the threshold, what should be increased?

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

Candela is the luminous intensity, in the perpendicular direction of a surface _________ square meter of a black body at the temperature of freezing platinum under a pressure of 101325 newtons per square meter.

NTS 2013
Physics
Dawn of Modern Physics
Elimination Tool:

A wire is stretched by a force which causes an extension. The energy is stored in it only when:

UHS 2011
Physics
Physics of Solids
Elimination Tool:

The six strings of a guitar are the same length under nearly the same tension, but they have different thicknesses. On which string do waves travel the fastest?

NUMS 2015
Physics
Wave Motion and Sound
Elimination Tool:

A system absorbs 1000 Joules of heat and delivers 600 Joules of work, while losing 100 Joules of heat by conduction to the atmosphere, the change in the internal energy of the system will be:

NTS 2012
Physics
Heat and Thermodynamics
Elimination Tool:

Flux passing through an area does not depend upon

According to the hook’s law, strain is directly proportional to stress

In simple harmonic motion, acceleration will be maximum, when object is at:

UHS 2019
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

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

PMC 2020
Physics
Wave Motion and Sound
Elimination Tool:

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:

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?

Two glass prisms Pl and P2 are to be combined together to produce dispersion without deviation. The angle of the prisms P1 and P2 are selected as 40 and 30 respectively. If the refractive index of prism Pl is 1.54, then that of P2 will be:

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

Which of the following are component of half wave rectifier?

PMC Practice 1
Physics
Alternating Current
Elimination Tool:

A conductor of length L is moved across a magnetic field. Due to this activity, a potential difference appears across the ends of the conductor. This type of potential difference is termed as:

NTS 2018
Physics
Magnetism and Electromagnetic Induction
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:

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:

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

NUMS 2016
Physics
Electrostatics
Elimination Tool:

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

Entropy on melting of ice

The value and units of the Planck constant ‘h’ can be expressed as:

UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

Electron Volt is the unit of:

PMC Sample 1
Physics
Electrostatics
Elimination Tool:

What will be the energy of electron travelling at 10^7 m/s

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:

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:

A body starts sliding on a rough horizontal surface with a speed of 10 m/s. If the coefficient of friction is 0.2, find the distance traveled by the body before coming to rest. (g = 10m/s)

NTS 2010
Physics
Forces and Motion
Elimination Tool:

If stress is doubled, then volume becomes

Which of the following is not a S.I. base quantity.

NUMS 2018
Physics
Measurements
Elimination Tool:

The main difference between X rays and Y rays is:

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

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

NUMS Mock 1
Physics
Atomic Structure

Which of the following consist of two quarks? a

Which of the following has no acceleration:

Transvers waves can transfer their energy on, In

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:

terminal velocity of a water droplet is dependent on:

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

An alternation voltage V (in volts) is represented by the equation:
V = 300 sin (100πt)
What is the value of “f” for this voltage?

UHS 2019
Physics
Alternating Current
Elimination Tool:

Law of Conservation of Momentum states that total linear momentum of system remains constant if:

NUMS Mock 1
Physics
Forces and Motion

The potential energy of a particle having a mass of 0.5 kg, moving along the x axis, is given by U= 2*x(x-3), where x = the distance moved by the particle. The speed of the particle will be maximum when it has moved a distance of:

PMC Sample 2
Physics
Work, Power and Energy
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

A star moving away from earth shows:

PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:

Mechanical energy of an object is the sum of its Potential Energy and ?

If the potential difference of 1 volt is applied across the end of a conductor and the current flowing through the conductor is one ampere then the resistance of the conductor is said to be?

NTS 2015 SMBBMC
Physics
Electrostatics
Elimination Tool: