An object placed in front of a concave mirror at a distance of X cm from the pole gives a 3 times magnified real image. If it is moved a distance of X+5cm, the magnification of the image becomes 2. The focal length of the mirror is:

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

Ratio of Electrical Constant to Gravitational constant is approximately:

A power line 8m high carries a current 100A. What is the magnetic field of wire at ground?

NUMS Mock 1
Physics
Magnetism and Electromagnetic Induction

A particle moving along a circular path of radius 5m and with uniform speed 5 m/s. What will be the average acceleration when the particle completes half revolution?

1 radian is equal to:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

Which type of current passes through extrinsic semiconductors diode?

What happens to bulk of potential energy of a glass that falls from a table and breaks

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

Spherical aberration can be reduced by using

A convex lens of focal length ‘f1’and a concave lens of focal length ‘f2’ are placed in contact. The focal
length of the combination is

The half-life of a radioactive element depends upon:

NUMS Mock 4
Physics
Nuclear Physics

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:

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

the value of permeability

Final image produced by a compound microscope is

In which rectifier is the ripple factor less?

PMC Practice 1
Physics
Alternating Current
Elimination Tool:

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

NUMS 2016
Physics
Physics of Solids
Elimination Tool:

Dimensions of linear Momentum are:

Which measure Is nearest to your height?

What is the time period of sin(wt) ?

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:

Which of the following Is correct?

When photons are incident on a metal, electrons are emitted. The process is called:

NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
Elimination Tool:

If an ideal gas has volume V at 27 C and it is heated at constant pressure so that its volume becomes 1.5 V, then the value of final temperature is:

NUMS 2018
Physics
Heat and Thermodynamics
Elimination Tool:

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

A special class of waves that does not need a material medium for their propagation are called

NUMS Mock 4
Physics
Physics of Solids
Wave Motion and Sound

S.I. Unit of rate of flow of a fluid :

NUMS 2018
Physics
Fluid Dynamics
Elimination Tool:

In Nuclear reactions, we have the conservation of:

NTS 2017
Physics
Nuclear Physics
Elimination Tool:

There are leptons

if electron is moving along positive x axis and where V= Sx*3 then it

The K.E. of a body of mass 2kg and momentum of 2N is:

PMC Sample 1
Physics
Work, Power and Energy
Elimination Tool:

A disc, a hoop, and a sphere of the same mass and radius are rolled down from a frictionless, inclined plane. Which has a greater speed on reaching the ground?

NUMS 2015
Physics
Circular Motion and Momentum
Elimination Tool:

The velocity of X rays is equal to that of:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

Which one has least value?

Molar mass of water is:

PMC Sample 2
Physics
Measurements
Elimination Tool:

If a wire having current 10A has a 3T magnetic field, what will be the magnetic field at a point from the wire at double the distance?

NUMS Mock 3
Physics
Magnetism and Electromagnetic Induction

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:

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:

According to Bohr’s theory of Hydrogen atom, only those atomic orbits with radii ‘r’ and atomic shell ‘n’ around the nucleus are allowed which have the angular moments:

NTS 2016 DUHS & JSMU
Physics
Atomic Spectra
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:

In Einstein’s theory, the deflection of light is predicted to be exactly as great as it is according to Newton’s theory

Weber x ampere per meter is equal to:

NUMS 2016
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The length and width of a rectangular plate are measured to be 15.3 mm and 12.50 mm. Find the area of the plate up to an appropriate number of significant figures.

NUMS 2017
Physics
Measurements
Elimination Tool:

The earth rotates on its axis once a day. Suppose, by some process the earth contracts so that it’s radius is only half as large as at present, then how long the earth will take to complete it’s rotation?

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

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

Rays produced by LED are:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

Critical angle is that incident angle in denser medium for which angle of refraction is.

The charge on neutron is:

NUMS 2018
Physics
Electrostatics
Elimination Tool:

Astronomers calculate speed of distant stars and galaxies using which of the following phenomena:

PMC 2020
Physics
Wave Motion and Sound
Elimination Tool:

An object whose mass is 100 g starts from rest and moves with constant acceleration of 20 cm/s2. At the end of 8s its momentum in g cm / s is:

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

A machine worker placed a cylinder with a diameter of 18 cm between the plates of a hydraulic press. If he applies a 4.25 x 105N force to the cylinder, the stress on the end of the cylinder due to the applied force is A x 107Pa.

What is the value of A?

NUMS 2019 Cancelled
Physics
Heat and Thermodynamics
Elimination Tool:

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:

The change in resistance of metallic conductor at temperature below 0 degrees is:

PMC 2020
Physics
Current Electricity
Elimination Tool:

Which of the following is not E.M wave?

ETEA 2019
Physics
Electromagnetic Waves
Elimination Tool:

If peak voltage across a full wave rectifier is 20V then Vrms is:

PMC Practice 10
Physics
Electronics
Elimination Tool:

A and B are bulbs connected in series with 40-volt battery and a bulb C is connected with 40-volt battery Glow of bulbs will be:

In an astronomical telescope, the distance between the objective and eyepiece is called:

NTS 2013
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

If stress is applied on a body then the ratio of change in volume to original volume will be:

NUMS 2016
Physics
Physics of Solids
Elimination Tool:

In hydrogen spectrum, Lyman and Balmer series belong to which region?

If mass attached to a spring and the spring constant of a spring are doubled, the resulting Time period will:

What will be the time period of pendulum if length becomes S times and g becomes 1/5 times at some height from the earth?

When a car moves with constant velocity force on it is

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:

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:

If speed of a fan in a room is Increased then the temperature of air in the room will

Two vectors of magnitude 10m and 20m have an angle 30° between them. The component of shorter vector parallel to the longer vector will be:

Induced emf depends upon:

Impedance in RLC series circuit Is given by

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:

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:

If force of 2.5N changes the velocity from 50 m/s to 100m/s in time 50. the mass of the body’

Extraterrestial waves are also called:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

When wood is replaced by air as dielectric. The capacitance of capacitor

If frequency of incident light is increased beyond threshold frequency, keeping light intensity constant, then:

NUMS Mock 2
Physics
Dawn of Modern Physics

In an astronomical telescope, the lens called eyepiece forms an image of a distant object that is:

NTS 2016 SMBBMC
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Which of the following Is not true about radioactivity?

In an extrinsic semi-conductor charge carriers are

An electron is placed between two charged plates the upper plate is positively charged and the lower plate is negative charged. The electron will

The potential difference between the terminals of a battery in an open circuit is 2.2 V. When it is connected across a resistance of 5.0 Ω, the potential falls to 1.8 V. What is the internal resistance of the battery?

NTS 2015 DUHS and JSMU
Physics
Current Electricity
Elimination Tool:

The velocity of a disc at the bottom of an inclined plane is?

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

Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will:

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

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:

If frequency of incident light is increased beyond threshold frequency, keeping light intensity constant, then:

NUMS 2019 Reconduct
Physics
Dawn of Modern Physics
Elimination Tool:

Radiation cause damage in a)

What is the work done by a body moving with 1 m/s velocity in circular orbit of radius 10m?

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

The number of diodes in bridge rectifier is

PMC Sample 3
Physics
Alternating Current
Elimination Tool:

The rectifier is a device which converts?

PMC Practice 3
Physics
Alternating Current
Elimination Tool:

Equation of SHM, with amplitude ‘a’ is given by:

NUMS 2015
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

A real image formed by convex lenses is always:

NUMS 2016
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Electric potential is a quantity.

Four particles independently move at the same speed in a direction perpendicular to the same magnetic field. Which particle is deflected the most?

NTS 2017
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

A ball is thrown vertically upward with a velocity of 98 m/s. If it takes 10 seconds to reach the highest point then the acceleration of the ball is:

NUMS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

If two or more resistors are joined to each other side by side, this combination is called:

NUMS 2018
Physics
Current Electricity
Elimination Tool: