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:

Energy emitted in the form of visible radiation is called:

2022 PMC Test 1
Physics
Electromagnetic Waves
Elimination Tool:

Transistors can be used as:

PMC Practice 10
Physics
Electronics
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:

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:

Branch of physics which deals with sub atomic particles.

In heavy nuclei the number of neutrons is than protons

Electric intensity between two plates of a capacitor equals:

Compton shift is maximum at:

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

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

Newton’s 3rd law of motion is for bodies that are

for normal adjustment, length of astronomical telescope is

Consider the spectral line resulting from the transition from n=2 to n=1, in atoms and ions given below. The shortest wavelength is produced by:

PMC Sample 3
Physics
Atomic Spectra
Elimination Tool:

The young’s modulus of a given rod of uniform length ? is given by the relation:

ETEA 2018
Physics
Physics of Solids
Elimination Tool:

A bar magnet has a magnetic moment 200 Am2. The magnet is suspended in a magnetic field of 0.30 NA-1m-1. The torque required to rotate the magnet from its equilibrium position at an angle of 30˚ will be:

NUMS 2014
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Voltage Is current In RC circuit.

In a river flow of water is maximum at

The maximum efficiency of a half-wave rectifier is:

PMC Practice 3
Physics
Alternating Current
Elimination Tool:

Which of the following is a conservative field?

The maximum instantaneous value measured from zero value is known as?

PMC Sample 3
Physics
Alternating Current
Elimination Tool:

Whenever the average and instantaneous velocities are equal the body is said to have a:

NTS 2016 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

Formula of maximum range of projectile is?

There is a current of 25 A in a long straight wire. What is the flux density at a point 3 cm from the wire?

NTS 2016 SMBBMC
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

If a body A is charged with charge q, and is touched with neutral body B and then with neutral body C. What will be the charge on C after the contact?

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

In medical scanning, which rays are used?

PMC Practice 18
Physics
Electromagnetic Waves
Elimination Tool:

What are the Dimensions of P^2/m, where P is the momentum and m is the mass?

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:

Which of the following gives the correct expression of Decay Constant?

To remove the huge amount of heat energy in a nuclear reactor, _____ is/are used

NUMS Mock 4
Physics
Nuclear Physics

A simple pendulum is suspended from the ceiling of a lift has a time period T when the lift is at rest. when it fall freely

The bridge rectifier is preferred to an ordinary two diode full-wave rectifier because?

PMC Practice 2
Physics
Alternating Current
Elimination Tool:

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

NTS 2013
Physics
Wave Motion and Sound
Elimination Tool:

In a circuit, there is a current of 5 amp which is changed such that the current falls to zero in 0.1 sec. If an average e.m.f. of 200 volts is induced, the self-inductance of the circuit will be:

NTS 2012
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Which measure Is nearest to your height?

Two unequal resistances are connected parallel across a battery. Which of the following statements is true?

NUMS 2018
Physics
Current Electricity
Elimination Tool:

When a potential difference is applied across the ends of a uniform wire of length l and radius r, a current I flows in the wire. If same potential difference is applied to the ends of another wire of the same material but of length 2l and radius 2r, the current in the wire is:

NUMS Mock 4
Physics
Current Electricity

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

A paratrooper is falling down with uniform velocity and also rotating with a constant angular velocity of 0.2 rad/sec. The body satisfies ______.

NTS 2019
Physics
Forces and Motion
Elimination Tool:

Acceleration in the simple pendulum is always _______ to displacement.

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

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:

• Q.75 Velocity is a

The newton-second is the unit of:

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

How many quarks neutron and proton is made up of?

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:

White light gives spectrum after undergoing:

PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:

A nucleus weighs less than Its sum of nucleons, a quantity known as the

Electric potential is a quantity.

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:

When some charge is given to a soap bubble it

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.

UHS 2018
Physics
Dawn of Modern Physics
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:

Which group consists of only electromagnetic waves?

PMC Sample 1
Physics
Dawn of Modern Physics
Elimination Tool:

A Black body is?

Evaluate the scalar product of the following: k.( i + j) ?

NTS 2015 SMBBMC
Physics
Scalars and Vectors
Elimination Tool:

Stokes’ Law for steady motion in a fluid of infinite extent is given by:

UHS 2012
Physics
Fluid Dynamics
Elimination Tool:

A particle is moving in a circle with radius r and velocity v if radius is doubled keeping the velocity constant, the value of tangential acceleration will be:

The dimensions of volume and acceleration (respectively) are:

NTS 2010
Physics
Measurements
Elimination Tool:

The values of electric intensity will ____ due to the presence of dielectric medium:

PMC 2020
Physics
Electrostatics
Elimination Tool:

A wire has a spring constant of 5 x 104 N m-1. It is stretched by a force to extension of 1.4 mm. Calculate the strain energy stored in the wire.

UHS 2019
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

0.37q charge Is stored on the capacitor, what will be the current?

Time period of simple pendulum depends on

Germanium and silicon are semiconductors having crystalline structures. Both these materials have ______ valence electrons in their outermost shells.

NTS 2014
Physics
Electromagnetic Waves
Elimination Tool:

Bright Lines in pattern show:

PMC Practice 5
Physics
Atomic Spectra
Elimination Tool:

During the process of nuclear disintegration, when alpha particle emission occurs, atomic no. of the atom changes by _____ and its mass number changes by _____.

NTS 2016 DUHS & JSMU
Physics
Nuclear Physics
Elimination Tool:

Which one of these is used in the treatment of Cancer?

Two identical bodies have a velocity ratio 2 : 3. What is the ratio of kinetic energies?

NUMS 2020
Physics
Work, Power and Energy
Elimination Tool:

Energy difference in balmer series for longest wavelength is

PMC Sample 3
Physics
Atomic Spectra
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 2017
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

Unit of CV^2 is equivalent to that of?

Joules

Value of Wien’s constant is?

Why picture on a TV screen become distorted when a magnet is brought near the screen?

NUMS Mock 2
Physics
Magnetism and Electromagnetic Induction

Maximum efficiency of half wave rectifier is:

PMC Practice 11
Physics
Electronics
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:

A body of mass 0.5 kg starts from rest (t=0) & experiences a force F. 8i + 6j. What will be its
velocity at t=1 if A covers a distance of 4m?

A mixture of electric fields and magnetic fields is?

A body moving on a fluid will experience:

NUMS 2016
Physics
Fluid Dynamics
Elimination Tool:

Gamma rays cause photoelectric emission when their energy is

Q²/C has the units of?

Identify the factor on which mutual inductance does not depend:

PMC Practice 3
Physics
Alternating Current
Elimination Tool:

The vector product of two vectors A and B is ____ vectors A and B.

NTS 2019
Physics
Scalars and Vectors
Elimination Tool:

Why is the total mass of all individual protons and neutrons in a nucleus greater than the mass of the nucleus which they constitute?

NUMS Mock 2
Physics
Nuclear Physics

The half wave rectifier has how many diodes?

PMC 2021 Tested
Physics
Electronics
Elimination Tool:

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

PMC Practice 10
Physics
Electronics
Elimination Tool:

A circuit in which there is a current of 10 amperes is changed so that the current falls to zero in 0.5 seconds. If an average e.m.f. of 400 volts is induced, what is the self-inductance of the circuit?

NTS 2015 DUHS and JSMU
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

An alpha particle is ejected from the nucleus of an atom. Which of the following answers describes the change in the nucleus of the atom?

NUMS 2014
Physics
Nuclear Physics
Elimination Tool:

1 kilowatt hour =

NUMS Mock 2
Physics
Work, Power and Energy

When speed is doubled the centripetal force will be?

Unit of electric field is:

Which of the following is the angle of projection of a projectile if its range is equal to its height?

NUMS 2020
Physics
Forces and Motion
Elimination Tool: