When an electron jumps from outer to 5th orbit, then the spectral lines fall into region.

An object is dropped from the top of the building. If it takes 10 seconds to hit the ground, what is the height of the building?

NTS 2015 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

If length of a wire is Increased two times and Its cross-sectional area is reduced to half, the resistance of the wire will be:

• Q.132 In stretched string the frequency of vibration is given by f=1/2LVF/m. In this equation m has dimension

A body of mass of 2kg absorbed 10 J of radioactive radiations. The absorbed dose of radiation in rad is:

NUMS Mock 1
Physics
Nuclear Physics

The resistivity in SI units is measured in:

NTS 2016 DUHS & JSMU
Physics
Current Electricity
Elimination Tool:

The motion of particle executing SUM is given by x = 0.01 sin 100 π t, where x is in meter and time is in second. The time period is

In rotation motion the torque is:

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:

A parallel beam of white light is incident normally on a diffraction grating. It is noted that the second-order and third-order spectra partially overlap. Which wavelength in the third-order spectrum appears at the same angle as the wavelength of 600 nm in the second-order spectrum?

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

An emf of 120 volts of negligible internal resistance is connected across a resistance of 1000 ohm. The current flowing through the circuit will be:

NUMS 2015
Physics
Current Electricity
Elimination Tool:

Young modulus for the perfectly rigid body is

When an object is thrown upward, it rises to height h. How high is the object in terms of h, when it has lost ⅓ of its original kinetic energy?:

NTS 2019
Physics
Work, Power and Energy
Elimination Tool:

If the velocity of the body is decreasing, the acceleration is negative. The negative acceleration is known as:

NTS 2015 SMBBMC
Physics
Motion in Two Dimensions
Elimination Tool:

The combination of ammeter, voltmeter, and ohmmeter into a compact single meter with one common galvanometer is called:

NTS 2015 SMBBMC
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Energy required to charge a capacitor of 5 micro farad by connecting D.0 source of 20 KV is a) 10kJ b) 5k1 c) 21:.1 d) 11(1

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:

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:

The stationary waves can be set up on the string only with the frequencies of harmonic series determined by:

PMC Sample 3
Physics
Wave Motion and Sound
Elimination Tool:

Trough of a wave acts as:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

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

Half-life of iodine-131 is 8 days. If 20mg is present initially. How much iodine is left behind after 2 half-lives?

NUMS 2020
Physics
Nuclear Physics
Elimination Tool:

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

When the output power equals to one-half of the input power, efficiency of the transformer becomes:

NUMS 2015
Physics
Work, Power and Energy
Elimination Tool:

In full wave rectifier with input frequency 50 Hz the ripple in the output is mainly of frequency

PMC Practice 6
Physics
Electronics
Elimination Tool:

Find the heat transferred to or from the system when a thermodynamics system undergoes a process in which its internal energy decreases by 300 J. If at the same time, 120 J of work is done on the system.

NTS 2016 DUHS & JSMU
Physics
Heat and Thermodynamics
Elimination Tool:

General Equation of SHM is given as: x(t) = A sin(wt) Find approximate value of wt, if x(t) = 71cm and A=100cm.

At what angle of projection of a projectile the range becomes half of its maximum value?

PMC 2020
Physics
Motion in Two Dimensions
Elimination Tool:

Characteristic x-rays are produced by:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

An ammeter reads up to 1 A. Its internal resistance is 0.81 Ω. To increase the range to 10 A, the value of the required shunt is:

NTS 2012
Physics
Current Electricity
Elimination Tool:

In a river flow of water is maximum at

What is the kinetic energy at the extreme position during SHM?

Escape velocity of moon is

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:

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:

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

What will be impact on the frequency of a simple pendulum if the length of pendulum is halved
and value of gravity is doubled?

The light exhibits the phenomena of constructive interference under the situation when it is ______ and ______.

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

In hydrogen spectrum If nj = 6, then the spectral lines lie In:

To get a peak load voltage of 40V out of a bridge rectifier, what should be the approximate rms value of secondary voltage?

PMC Practice 5
Physics
Electronics
Elimination Tool:

How much heat is absorbed by 100 g of water when its temperature decreases from 25. C to 5. C? (heat capacity is 4.2 j/gk)

NUMS 2016
Physics
Heat and Thermodynamics
Elimination Tool:

Value of solar constant on the surface of Earth is:

Sound waves are:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

Unit of CV^2 is equivalent to that of?

Work will be maximum when the angle between force and displacement is:

The unit of impulse is same as of

Which of the ,following act as a heat pump?

ECG records

Final image produced by a compound microscope is

What is farad of electricity?

Energy stored in capacitor is represented by.

In CRO, electrons are emitted from:

White light does not focus to a single point after passing through a convex lens due to

How many neutrons are released during fusion of two deuterons?

Value of  ∊ _s is:

Vector components In space are

Blood pressure of a healthy person is mm Hg.

Identify the examples of kinetic energy

A moving ball can break a glass window
A striking hammer can drive a nail
A stone thrown upward can lift itself against the force of gravity
NTS 2015 SMBBMC
Physics
Work, Power and Energy
Elimination Tool:

The phenomenon by which light travels in an optical fibres is:

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

Half wave voltage multiplier can provide any degree of voltage multiplication by cascading diodes and capacitors.

PMC Practice 12
Physics
Electronics
Elimination Tool:

Two equal, opposite charges are fixed at a distance d. Positive charge is at the right and negative at the left position. As shown below:

X – Y + Z

At which position, the net electric field is directed to the left?

PMC Sample 2
Physics
Electrostatics
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 Mock 1
Physics
Work, Power and Energy

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 time period of sin(wt) ?

Which of the following gives the relationship between linear velocity and angular velocity?

NUMS Mock 3
Physics
Circular Motion and Momentum

If magnitude of charges is doubled and distance between them is halved, the force between them will become?

A fixed mass of gas in a thermally insulated container is compressed. After compression, the temperature of the gas will have:

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

The least distance of distinct vision for normal eye is approximately

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 Mock 3
Physics
Circular Motion and Momentum

In half wave rectification, the output DC voltage is obtained across the load for?

PMC Practice 10
Physics
Electronics
Elimination Tool:

Blue colored source is seen Red if

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:

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

Light can be polarized by:

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

When the antinodes, in stationary waves, are passing through their equilibrium position, the energy is:

NUMS Mock 2
Physics
Wave Motion and Sound

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:

Two charges are separated by a distance r, in presence of which of the following the force between them will be minimum?

If v = a + bt, the dimensions of a and b are

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 Mock 3
Physics
Nuclear Physics

A body of mass m = 3.513 kg is moving along the x axis with a speed of 5.00 ms^-1 of  the magnitude of Its momentum Is recorded as

Photoelectric effect is not produced by:

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

A car 500 kg is travelling at a constant speed of 9 m/s round a curve of 100m. What is the centripetal force?

NTS 2019
Physics
Circular Motion and Momentum
Elimination Tool:

Half-life of iodine-131 is 8 days. If 20mg is present initially. How much iodine is left behind after 2 half-lives?

NUMS Mock 1
Physics
Nuclear Physics

Wave nature of light is proved by:

PMC Practice 1
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Orange light in a vacuum has a wavelength of 600 nm. What is the frequency of this light?

ETEA 2018
Physics
Electromagnetic Waves
Elimination Tool:

Capacitance increases by

In a certain process, 400 J of heat energy is supplied to a system and at the same time 150 J of work is done by the system. The increase in internal energy of the system is _______.

NUMS 2020
Physics
Heat and Thermodynamics
Elimination Tool:

Which of the following is the pair of isobars?

NUMS 2016
Physics
Nuclear Physics
Elimination Tool: