ECG records

An A.C emf of E = 100 sin (100 π t) volt is concerned with a choke of negligible resistance. In order to produce current of amplitude 1 A, the inductance of the choke should be:

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

A bullet on penetrating 30cm into its target loses its velocity by 50%. What additional distance will it penetrate into its target before it comes to rest?

NUMS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

Three books A, 8, C are place on each other with A on top, B in mid and C at bottom. If weight of A is 2N, B is 5N and that of C is 4N, what is the total force being exerted on book B?

If the current flow increases to 100 times, the energy stored in the inductor will increase to:

The deviation of I-V graph from straight line is due to:

NUMS 2016
Physics
Current Electricity
Elimination Tool:

The quantity of heat required to raise the temperature of one mole of a substance through 1 K is called:

NTS 2010
Physics
Heat and Thermodynamics
Elimination Tool:

The area under the extension-load graph Of an elastic material whose elastic limit has not been exceeded gives its:

NUMS Mock 2
Physics
Work, Power & Energy

An object is undergoing simple harmonic motion. It’s time period is T and total energy is E. The amplitude of vibration is reduced to half. What is the new time period and total energy of the system?

PMC Practice 5
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

The centripetal acceleration is maximum when radius r is:

PMC Sample 1
Physics
Circular Motion and Momentum
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:

If the potential at a point which is 1m from a charge is 1 volt, then the potential at a point which is 2m from the same charge will be:

PMC 2020
Physics
Electrostatics
Elimination Tool:

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

The beat frequency is given by:

NUMS Mock 1
Physics
Wave Motion and Sound

The dimensions of volume and acceleration (respectively) are:

NTS 2010
Physics
Measurements
Elimination Tool:

How many types of modulations are possible with sinusoidal carrier?

NTS 2016 SMBBMC
Physics
Wave Motion and Sound
Elimination Tool:

Dimension of modulus of elasticity:

A wave, which transfers _____ by moving away from the source of disturbance is called _____ wave.

NUMS 2019 Reconduct
Physics
Wave Motion and Sound
Elimination Tool:

In modern day electrical arrangements, which of the following is connected in series with the others?

In which rectifier is the ripple factor less?

PMC Practice 1
Physics
Alternating Current
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

A particle of charge -0.04C is projected with speed 2 x 104 m/s into a uniform magnetic field ‘B’ of strength 0.5 T. If the particle’s velocity as it enters the field is perpendicular to ‘B’, what is the magnitude of the magnetic force on this particle:

NTS 2010
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Dimensions of torsional couple Is similar to the dimension of

Third law of Newton is also called:

NUMS 2016
Physics
Forces and Motion
Elimination Tool:

A neutron travels a distance of 24 m in a time interval of 3.6 x 10^-4 s. Assuming its speed was constant. Find its kinetic energy. Take 1.7 x 10^-27 kg as the mass of the neutron.

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

EEG is related to:

i.(j*k)

The polarization of light by tourmaline crystals is due to the ______effect.

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

The product of dimensions of Young’s modulus and stress are:

NUMS 2017
Physics
Physics of Solids
Elimination Tool:

Thirty joules of heat flow into a system. The system in turn does 50 Joules of work. The internal energy of the system has:

NUMS Mock 2
Physics
Heat and Thermodynamics

Which of the following particles has greater wavelengths having the same velocity?

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

Consider an object placed on a frictionless inclined plane at a height of 5m , if it is released, what will be its velocity at the bottom of the inclined plane?

NUMS 2017
Physics
Forces and Motion
Elimination Tool:

A semiconductor photodiode is a:

NTS 2011
Physics
Electronics
Elimination Tool:

Sodium nucleus consists of 11 protons and 12 neutrons. The conventional symbol of this nucleus is?

NTS 2014
Physics
Nuclear Physics
Elimination Tool:

Which of the following phenomenon proves that light waves are transverse waves?

NUMS Mock 1
Physics
Electromagnetic Waves

When the frequency of the applied force becomes equal to one of natural frequencies of body then the body oscillates with maximum displacement this phenomenon is called:

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

If the length of a current carrying solenoid is doubled keeping the number of turns same and the current is increased to 9 times, the value of magnetic field compared to the original magnetic field B will be:

Find the gravitational force of attraction between two balls each weighing 10 kg, when placed at a distance of 1 meter apart.

NTS 2016 DUHS & JSMU
Physics
Gravitation
Elimination Tool:

The maximum Compton shift Is at

A block of mass m = 2 kg is attached to an ideal spring of spring constant k = 200 Wm. The block is at rest at its equilibrium position. An impulsive force acts on the block, giving it an initial speed of 2 m/s. Find the amplitude of the resulting oscillations.

In motion of satellites, necessary centripetal force is provided by:

NUMS Mock 1
Physics
Circular Motion and Momentum

A convex lens gives a virtual image only when the objects leis

Alternating Current Generators use:

PMC Practice 5
Physics
Alternating Current
Elimination Tool:

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?

What should the distance of an object from a convex lens of focal length f=10 cm in order to produce an erect image twice as large as the object?

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

In medical scanning, which rays are used?

PMC Practice 18
Physics
Electromagnetic Waves
Elimination Tool:

A cable 4 km long and of total resistance 1 Ohm carries electric current from a generator producing 100kW at 10,000 Volts. The current in amperes in the cable is:

PMC Practice 5
Physics
Electronics
Elimination Tool:

Which statement describes the electric potential difference between two points in the electric field of charge Q?

NTS 2019
Physics
Electrostatics
Elimination Tool:

Ball thrown freely from a tower reaches ground in 4s. The height of tower Is about

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

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:

Two negative charges are present at a distance d. A third positive charge is placed somewhere between these charges. This positive charge will be in equilibrium.

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:

theory of was Relativity proposed by

An electron is moving along the axis of a solenoid carrying a current. Which of the following is a correct statement about the electromagnetic force acting on the electron?

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The amount of heat provided to a system at constant pressure (qp) is equal to _______.

NTS 2012
Physics
Heat and Thermodynamics
Elimination Tool:

Under what condition an object will have zero displacement but non zero distance?

PMC 2020
Physics
Circular Motion and Momentum
Elimination Tool:

In Double Slit experiment, the fringe spacing of the diffracted rays increases when:

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

Two vectors are of magnitude 50 and 31,the resultant might be?

If both inputs “A” and “B” are ON and the output is also ON. This type of gate is known as:

NUMS 2017
Physics
Electronics
Elimination Tool:

If μ is the permeability of the medium and ∈ permittivity of the medium then the value of √ 1 / μ . ∈. Is equal to ______.

NTS 2019
Physics
Wave Motion and Sound
Elimination Tool:

Red light is used in photographic dark room because of:

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

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

NUMS 2020
Physics
Current Electricity
Elimination Tool:

With the usual notation, the first law of thermodynamics applied to one mole of an ideal gas can be written in the following form:

CvΔT=ΔQ – PΔV

In a change for which Boyle’s law is obeyed, which of the following would necessarily be zero?

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

A proton Is moving in direction of negative x-axis, what will happen to it if potential difference of V = -10x + 7 is applied across the field.

The food we eat in one day has about the same energy as:

NUMS 2020
Physics
Work, Power and Energy
Elimination Tool:

Which of the following phenomenon proves that light waves are transverse waves?

PMC Practice 4
Physics
Electromagnetic Waves
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:

Magnifying power of simple microscope

The internal energy of a system during an isothermal process:

PMC 2020
Physics
Heat and Thermodynamics
Elimination Tool:

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:

Energy stored in capacitor is represented by.

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:

Unit of Angular Momentum? a) Kg m2 s’1b) c) Js-1 d) Both a and b

Centrifugal force Is:

In order to produce pair production the minimum energy of photon required is:

NTS 2019
Physics
Dawn of Modern Physics
Elimination Tool:

In microwave ovens ____ is used to heat the food

PMC Practice 33
Physics
Electromagnetic Waves
Elimination Tool:

A body moving with velocity V can be stopped by a force F in direction of it. The same body moving with velocity 5 V can be stopped by a force 5F in distance equal to:

NUMS 2017
Physics
Forces and Motion
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:

In Nuclear reactions, we have the conservation of:

NTS 2017
Physics
Nuclear Physics
Elimination Tool:

Polarization explains light is ———

PMC Practice 8
Physics
Electromagnetic Waves
Elimination Tool:

Which of the following convert the heat energy Into electrical energy

Impedance of a circuit Is calculated as:

E/m of an electron is given by the relationship.

NUMS Mock 4
Physics
Magnetism and Electromagnetic Induction

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

Unit of Magnetic Flux is

If a dielectric material is placed between two plates of a capacitor, the net capacitance of the capacitor:

NTS 2018
Physics
Electrostatics
Elimination Tool:

If the speed of waves is 10m/sec and its frequency is 5Hz. Find its wavelength.

NUMS Mock 3
Physics
Wave Motion and Sound

Beta rays cannot be stopped by:

PMC Practice 11
Physics
Electromagnetic Waves
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:

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:

What is angular velocity?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool: