X-rays are used to measure?

PMC Practice 8
Physics
Electromagnetic Waves
Elimination Tool:

The bicycle pump works on the basis of:

NUMS Mock 2
Physics
Heat and Thermodynamics

Refrigerator is an example of:

NUMS Mock 4
Physics
Heat and Thermodynamics

The path difference for the constructive interference is:

NUMS 2018
Physics
Wave Motion and Sound
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:

How fast an H+ ion should move in magnetic field 2.5×10-3 T such that magnetic force equal its weight?

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

One kilowatt-hour is commonly termed as one commercial unit of electric energy which is equal to:

PMC 2020
Physics
Current Electricity
Elimination Tool:

A ballistic missile is

For one mole of gas, the relation for specific heat capacity at constant pressure ‘Cp’ and at constant volume ‘Cv’ is ________.

NUMS 2019 Reconduct
Physics
Heat and Thermodynamics
Elimination Tool:

Time period of simple pendulum depends on

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:

The unit of velocity is:

PMC Sample 2
Physics
Measurements
Elimination Tool:

The power of a concave lens is

The direction of the magnetic line of force depends upon:

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Light can be polarized by:

reflection
double refraction
scattering of light
NTS 2017
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

the period of rotation of geosynchronous satellite is

The film of oil on water shows colour pattern when illuminated by white light due to:

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

) Which can damage eye?

Unit of pressure?

A bulb having a resistance of 150 Ω is connected to a 225 volt source, the current in the bulb will be:

NTS 2012
Physics
Current Electricity
Elimination Tool:

A 3 kg stone falls from a 20m high platform. Find its falling speed at 10 m height.

NUMS Mock 1
Physics
Forces and Motion

All of the following is/are scalar quantities except:

NTS 2011
Physics
Scalars and Vectors
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:

Two vectors A and B both have magnitude of 5N and the angle between them is 135, then magnitude of A x B will be

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

NUMS 2018
Physics
Nuclear Physics
Elimination Tool:

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:

The fractional change in resistance per kelvin is known as:

NUMS Mock 2
Physics
Current Electricity

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:

A battery has an e.m.f of 6.0 volts and an internal resistance of 0.4 ohms. It is connected to a 2.6 ohms resistor through a SPST (single pole, single throw switch).

When the switch is open, the potential difference between the terminal of the battery is:

NTS 2010
Physics
Current Electricity
Elimination Tool:

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:

The displacement has __________.

PMC Practice 2
Physics
Scalars and Vectors
Elimination Tool:

If a 2 µF capacitor is connected, by closing a switch, to a supply of 100 volts through  1M ohm  series resistance. What will be the time constant?

1 femto is equal to

In mass-spring system, which of the following does not depend on the initial displacement of the spring?

PMC Practice 4
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

An object is falling down with a speed of 20 m/s. After 3 seconds

its velocity will be ______ m/s (g = 10 m/s2).

NTS 2019
Physics
Motion in Two Dimensions
Elimination Tool:

A line normal to the wavefront, showing the direction of the propagation of light is called the:

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

In CRO, electrons are emitted from:

A microscope has an objective of 10 mm focal length and an eye piece 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 2014
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Which one of the following properties is not exhibited by the longitudinal waves?

PMC 2020
Physics
Wave Motion and Sound
Elimination Tool:

A full wave rectifier is operating from 50 Hz mains. Fundamental frequency of ripple will be:

PMC Practice 1
Physics
Alternating Current
Elimination Tool:

The point at which an applied force produces linear motion but no rotatory motion is:

NUMS Mock 4
Physics
Forces and Motion

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

Branch of physics which deals with sub atomic particles.

The entropy of the universe always:

NUMS 2016
Physics
Heat and Thermodynamics
Elimination Tool:

The escape velocity of a body from the earth is Ve If the radius of the earth contracts to 1/4th its value, keeping the mass of the earth constant, the escape velocity will be

In a practical transformer mutual induction between primary and secondary coils takes place. In such transformer what can be deduced about the power.

UHS 2018
Physics
Alternating Current
Work, Power & Energy
Elimination Tool:

ECG records

Resistance of RCL series circuit at resonance Is?

Absolute zero is equivalent to:

NUMS Mock 2
Physics
Heat and Thermodynamics

potential difference in charge between two points in a circuit is known as?

The different magnitudes of same physical quantities are measured by comparing them to:

NUMS Mock 1
Physics
Measurements

Gamma rays are attracted towards

PMC Practice 11
Physics
Electronics
Elimination Tool:

Which of the following are component of half wave rectifier?

PMC Practice 1
Physics
Alternating Current
Elimination Tool:

A tuning fork A produces 4 beats with another tuning fork B. if the frequency of tuning fork B is 320 Hz, then the frequency of tuning fork A is:

PMC Practice 21
Physics
Electromagnetic Waves
Elimination Tool:

Equations of kinetics are valid only when the acceleration is:

NTS 2018
Physics
Forces and Motion
Elimination Tool:

A body moves on a circular path subtending an angle of 2 radians at the center of a circle of radius 3.5 meters. The linear displacement of the body is _________.

NUMS 2019 Reconduct
Physics
Circular Motion and Momentum
Elimination Tool:

Identify the dimensions of area, velocity and acceleration respectively: ( where L= Length, T=Time)

NTS 2015 SMBBMC
Physics
Measurements
Elimination Tool:

A Lead ball and a feather are dropped in vacuum both at the same time. Which of the following will be true:

When we measure the nuclear masses and compare them with the masses of the constituent nucleus in free states, the mass of the nucleus is always less than the mass of the constituent nucleons. The difference in mass is known as:

NTS 2015 DUHS and JSMU
Physics
Nuclear Physics
Elimination Tool:

Kelvin, is the unit of thermodynamic temperature, which is ________ of the thermodynamic temperature of the triple point of water.

NTS 2015 DUHS and JSMU
Physics
Heat and Thermodynamics
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

NUMS Mock 2
Physics
Oscillations and Simple Harmonic Motion

Radian Is a:

An object of mass 2kg has a velocity of 6m/s. After 8 seconds, its velocity increases to 10 m/s.
Calculate the power of the object

A ball falls vertically and bounces on the ground. The following statements are about the forces acting while the ball is in contact with the ground. Which statement is correct?

NTS 2017
Physics
Forces and Motion
Elimination Tool:

Aluminum Is a

________ are very high energy electromagnetic radiations of the extremely short wavelength emitted from the nuclei of radioactive atoms originating from the high energy transitions of the nucleons in the nuclei.

NTS 2015 DUHS and JSMU
Physics
Atomic Spectra
Elimination Tool:

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

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 Mock 3
Physics
Magnetism and Electromagnetic Induction

In Young’s double-slit experiment, if d is the separation between two slits 1 is the wavelength of light and θ is the angle of the line from the centre of slits to the point of observation on the screen; then for maxima (bright fringe); the formula is _________.

NTS 2019
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

In water pipes, ____ is used to detect leakages.

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

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:

Mutual inductance has a practical role in performance of:

PMC Practice 4
Physics
Alternating Current
Elimination Tool:

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 charge is moving with velocity v, it enters a uniform electric field E. The direction of v and E are not parallel. What is the path of the charge particle inside the electric field?

PMC Sample 2
Physics
Electrostatics
Elimination Tool:

A body of mass 4 kg attached to a spring is displaced through 0.04 m from its equilibrium position and then released. If the spring constant is 400 N/m, find the time period of the vibration?

NTS 2016 DUHS & JSMU
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

The number of revolutions In 3p1 radians

Dimension of Torque Is?

Dioptre power of an concave lens of 10 cm focal length is

A 3-cm length of wire is moved at right angles across a uniform magnetic field with a speed of 2.0 m/s . If the flux density is 5.0 teslas, what is the magnitude of the induced e.m.f?

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The ripple factor of a half-wave rectifier is:

PMC Practice 2
Physics
Alternating Current
Elimination Tool:

Value of resistivity of iron Is

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

A wave of light having the wave equation r = ro sin(wt) reflects from the water surface. After reflection, the equation of the wave will be:

A vector having magnitude equal to one is called

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:

Centrifugal force Is:

Transmutation occurs when rays are given out:

22320 cal heat is supplied to 100g of ice at zero degree centigrade. If the latent heat of fusion of ice is 80 cal /g and latent heat of vaporization of water is 540 cal/g the final amount of water thus obtained and its temperature respectively are:

NUMS 2014
Physics
Heat and Thermodynamics
Elimination Tool:

Water is flowing in a streamline motion through a horizontal tube. The pressure at a point in the tube is P where the velocity of now is v. At another point, where the pressure is P/2, the velocity of flow is: (density of water=ρ)

NUMS 2014
Physics
Fluid Dynamics
Elimination Tool:

What is true regarding magnetic force and magnetic intensity?

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

A thermocouple is immersed in water at 373 K and the other in ice at 273K. The emf of the thermocouple Is 90 (μ)V for each 1 K difference in temperature between junctions, and the thermocouple resistance is 6 Ω. What current will flow in the galvanometer connected in series with an internal resistance of 30ohms?

NTS 2010
Physics
Heat and Thermodynamics
Current Electricity
Elimination Tool:

The objective of a microscope is a lens of