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?

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

A sound wave with a frequency of 343 Hz travels through the air. What is its wavelength? (speed of sound through air = 343 m/s)

NTS 2014
Physics
Wave Motion and Sound
Elimination Tool:

that the supply for the potentiometer is taken?

PMC Practice 8
Physics
Alternating Current
Elimination Tool:

Transistors can be used as:

PMC Practice 10
Physics
Electronics
Elimination Tool:

A man throws a ball vertically upward in the compartment of an accelerated train. The ball will fall:

NUMS Mock 1
Physics
Motion in Two Dimensions

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

Red light is used in photographic dark room because of:

NUMS Mock 4
Physics
Optics, Nature of Light and Optical Instruments

if particles are displaced In direction perpendicular to waves then waves are? a)

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

NTS 2016 DUHS & JSMU
Physics
Work, Power and Energy
Elimination Tool:

A ball is released from a height h, above a table. Given that air resistance is negligible and 50% of its kinetic energy is converted to other forms of energy at each bounce, what will be the height reached after the second bounce?

In Doppler effect, if listener moves towards a stationary source then:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

The electric field of a point charge is in shape.

Minimum energy required to eject an electron from metal surface is called:

UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

Which pair includes a vector quantity and a scalar quantity respectively?

NTS 2017
Physics
Scalars and Vectors
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:

There are leptons

If the peak voltage is 9V, calculate the peak to peak voltage.

PMC Practice 8
Physics
Alternating Current
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:

The half life of C14 is about:

NUMS Mock 4
Physics
Nuclear Physics

A steel rod has a length of 15 m at a temperature of 30°C. If the temperature is raised to 45°C. The increase in its length is:

(α= 1.1 x 10-5 K-1)

NTS 2014
Physics
Heat and Thermodynamics
Elimination Tool:

Weber x ampere per meter is equal to:

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
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:

If each particle of fluid is passing through the same point, what would be the flow?

NUMS Mock 1
Physics
Fluid Dynamics

The target in the X ray unit is given a:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

The dimensional formula for change in momentum is same as that for:

ETEA 2018
Physics
Measurements
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:

The electron current is chiefly due to:

NUMS 2016
Physics
Wave Motion and Sound
Elimination Tool:

Dimensions of work?

An Inductor of 1H Is connected across a 220V, 50Hz supply. The peak value of current is approximately:

Which of the following is dimensionless quantity?

NUMS 2018
Physics
Measurements
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:

Beta particles are the particles emitted from the _____ of an atom.

NTS 2016 SMBBMC
Physics
Nuclear Physics
Elimination Tool:

• Q.145  A half-life of sodium-24 is __________ which is used to estimate the volume of blood in a patient:

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:

In a periodic wave, the distance between second and fifth crests is 15 cm, what is the wavelength of the wave?

PMC Sample 1
Physics
Wave Motion and Sound
Elimination Tool:

A 20.0 cm wire carrying a current of 10.0 A is placed in a uniform magnetic field of 0.30 T. If the wire makes an angle of 40° with the direction of the magnetic field, find the magnitude of the force acting on the wire? ( sin 40° = 0.642)

NTS 2015 DUHS and JSMU
Physics
Magnetism and Electromagnetic Induction
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

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe:

UHS 2013
Physics
Fluid Dynamics
Elimination Tool:

Unit of Momentum Is?

Two positive charges are separated by 3m. Another positive charge is placed between them. If the charge is moved along y axis the system will be in equilibrium

SI unit of acceleration is

Value of solar constant on the surface of Earth is:

A body moving with an angular velocity of 1 rev/sec has a frequency of:

A point where the incident parallel rays of light converge or appear to diverge after passing through a lens
is called

The least distance of distinct vision for a normal eye is

In Heisenberg Principle:

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:

What is the speed of 2.0 kg metallic bob at the mean position of a simple pendulum, when released from its extreme position 0.5m high? (g = 10 ms-2)

PMC 2020
Physics
Work, Power and Energy
Elimination Tool:

Minimum velocity needed to put the satellite into orbit is

An electron moving with velocity v has momentum 3 x 10 -26 Kg.m/s. The de Broglie wavelength associated with it is ______. Value of h = 6.63 x 10-34 is.

NTS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

If T is to be reduced to T/3 then length of pendulum should be: a) L/9 b) In c) l./3 d) L/4

When a charged particle is projected perpendicular to a magnetic field:

NUMS 2016
Physics
Electrostatics
Elimination Tool:

In a step-down transformer, the current in the primary coil is ______ than that in the secondary coil.

PMC 2021 Tested
Physics
Alternating Current
Elimination Tool:

Escape velocity of moon is

A changing electric field produces

The mass of earth on the basis of Newton’s Law of Gravitation is given by:

NTS 2012
Physics
Gravitation
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:

Name the scientist who won the noble prize for discovery of energy quanta

_____ 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

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

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

) Which can damage eye?

A factory buys 100 kg of a radioactive chemical with a half-life of 5 years which decays to a stable compound. How much of the chemical will still be radioactive in 10 years time.

NUMS 2017
Physics
Nuclear Physics
Elimination Tool:

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

NUMS 2020
Physics
Current Electricity
Elimination Tool:

If a car collides with a housefly, what will be the magnitude of the force experienced by the housefly?

NTS 2018
Physics
Forces and Motion
Elimination Tool:

X rays are affected by:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

Minimum frequency below which no electrons are emitted from the metal surface is called ______ frequency.

NTS 2016 DUHS & JSMU
Physics
Dawn of Modern Physics
Elimination Tool:

Speed and Pressure relation of a fluid is given by:

Which material is used as common conductor In daily use?

The basic source of geothermal energy is

Q.91 The source of gamma radiation is

Which of the following is an instrument for monitoring radiations:

NUMS 2016
Physics
Nuclear Physics
Elimination Tool:

In the SI system of units, the fundamental units of mass, time and length are ____, _____ and ______ respectively.

NUMS 2019 Reconduct
Physics
Measurements
Elimination Tool:

The maximum Compton shift Is at

The frequency of a wave as the source approaches the observer with speed v

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.1 m/s2. At the same instant a truck, traveling with a constant speed of 9.2 m/s, overtakes and passes the automobile. How far beyond the traffic signal will the automobile overtake the truck?

NTS 2010
Physics
Motion in Two Dimensions
Elimination Tool:

Which is most sensitive to human eye?

Temperature co-efficient of resistance is:

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

A cathode ray oscilloscope is displaying an AC signal. If one wave is completed in 2 cm along X- axis and time-base setting is 10 ms/cm, then frequency of AC signal will be:

NUMS Mock 4
Physics
Wave Motion and Sound

When reverse bias of a p-n junction diode is increased, a stage comes when electric field set up is sufficient to rupture covalent bonds and release a large number of holes and electrons. This breakdown phenomenon is known as:

NUMS 2018
Physics
Electronics
Elimination Tool:

Longitudinal standing wave, in second harmonic mode, is established in a tube that is open at both ends. The length of the tube is 0.8m. What is the wavelength of the waves that make up the standing wave?

PMC Practice 10
Physics
Electromagnetic Waves
Elimination Tool:

A red colored cloth red light

What is the constant of proportionality in ohms law:

Current that fluctuates periodically with time is ——

PMC Practice 4
Physics
Alternating Current
Elimination Tool:

The distance between two consecutive antinodes is equal to:

NUMS 2018
Physics
Wave Motion and Sound
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:

What is the name of the energy which is released when an atom is formed from its constituent particles?

NUMS Mock 3
Physics
Nuclear Physics

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: