What is the dimension of magnetic field

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

Drift velocity is of the order:

A particle of mass 5 mg moves with a speed of 8 m/s. Calculate its de Broglie wavelength (h = 6.63 x 10-34 Js)

NTS 2015 DUHS and JSMU
Physics
Atomic Spectra
Elimination Tool:

If length of simple pendulum is increased four times what will be effect on its frequency?

Branch of physics which deals with sub atomic particles.

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 rate of change of angular velocity with respect to _____ defines angular acceleration.

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

Which of the following has highest ionizing power and least penetrating power?

Transformer works on the principle of:

NTS 2016 SMBBMC
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

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:

To determine Young’s modulus of a material of a given wire of length ? we use:

ETEA 2018
Physics
Physics of Solids
Elimination Tool:

A nucleus consists of 11 protons and 12 neutrons. The conventional symbol of nucleus is:

NUMS Mock 3
Physics
Nuclear Physics

The ionization energy of hydrogen is:

The acceleration is a _____.

PMC Practice 6
Physics
Scalars and Vectors
Elimination Tool:

Two bodies ‘X’ and ‘Y’ are attached to the ends of a string which passes over a pulley so that the two bodies hang vertically. If the mass of the body ‘X’ is 10 kg and that of ‘Y’ is 9.8 kg. Find the acceleration? (g = 9.8 m/s2)

NTS 2016 DUHS & JSMU
Physics
Forces and Motion
Elimination Tool:

the period of rotation of geosynchronous satellite is

What is the projection of E = 2i-3j+6k onto the direction of vector F=i+2j+2k.

NTS 2016 DUHS & JSMU
Physics
Scalars and Vectors
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 motion of satellites, necessary centripetal force is provided by:

NUMS Mock 1
Physics
Circular Motion and Momentum

The half-life of C14 is about:

NTS 2012
Physics
Nuclear Physics
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 Mock 3
Physics
Circular Motion and Momentum

Change in entropy does not depend on:

NUMS Mock 3
Physics
Heat and Thermodynamics

A ball is thrown from some height; it strikes the ground and bounces back to the same height. This scenario represents which situation:

A handball is tossed vertically upward with a velocity of 19.6 m/s. Approximately how high will it rise?

NTS 2016 DUHS & JSMU
Physics
Circular Motion and Momentum
Elimination Tool:

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

Hooke’s law states that under normal conditions:

NUMS 2019 Cancelled
Physics
Physics of Solids
Elimination Tool:

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

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

If momentum is increased by 20% then K.E. increases by :

PMC Sample 2
Physics
Circular Motion and Momentum
Elimination Tool:

Total energy of an electron in hydrogen atom when it Jumps to higher orbit from a lower orbit Is

1 pascal = atm

The absolute standard of rest is:

A wire of area of cross section ‘A’ and original length ‘l’ is subjected to a load
‘L’. A second wire of the same material with an area is ‘2A’ and length ‘2l’ is
subjected to the same load ‘L’. If the extension in the first wire is ‘X’ and the second
wire is ‘Y’, find the ratio ‘X/Y’.

UHS 2015
Physics
Physics of Solids
Elimination Tool:

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:

If the instantaneous current in a circuit is given by I = A sin (wt) ampere, the RMS value of the current is:

PMC Practice 3
Physics
Alternating Current
Elimination Tool:

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:

The energy supplied by the cell to the charge carriers is derived from the conversion of:

NUMS Mock 1
Physics
Current Electricity

Law of Conservation of Momentum states that total linear momentum of system remains constant if:

NUMS Mock 1
Physics
Forces and Motion

Heisenberg uncertainty principle states:

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:

Energy of the 4th orbit in a hydrogen atom is:

PMC Sample 1
Physics
Atomic Spectra
Elimination Tool:

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

NTS 2016 SMBBMC
Physics
Nuclear Physics
Elimination Tool:

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:

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

NUMS 2017
Physics
Physics of Solids
Elimination Tool:

The magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called:

NUMS Mock 2
Physics
Magnetism and Electromagnetic Induction

Resistance opposes current, inductor opposes

1 radian = _____ degrees.

NTS 2012
Physics
Circular Motion and Momentum
Elimination Tool:

A sample of an ideal gas may : expand adiabatically or expand isothermally. The net flow of heat into the gas from the exterior is:

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

If voltage is 100V current is 10A and R Is 5ohm then internal resistance?

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:

Two sample of gases ‘1’ and ‘2’ are taken at same temperature and pressure
but the ratio of number of their volume is V1
:V2 = 2:3. What is the ratio of the
number of moles of the gas sample?

UHS 2015
Physics
Fluid Dynamics
Elimination Tool:

Which of the following can be the objective of Polarization:

A car at rest starts moving with linear uniformly increasing velocity. After 20 seconds, it attains the maximum velocity of 80 m/s. What is the distance covered during this time interval?

NUMS Mock 4
Physics
Forces and Motion

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

In which of the following scenarios will the K.E be zero?

What is the flux density at a point 3 cm from the long straight wire, when there is a current of 25 A in a wire: (u0= 4? x10-7)

NTS 2010
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

The product of frequency and time period is equal to:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

Assume that you have two balls of Identical volume, one weighing 2 Newtons and the other 10 Newtons. Both are falling freely after being released from the same point simultaneously. Which of the following will then be true:

I. The 10 N ball falling freely from rest will be accelerated at a greater rate than the 2 N ball

II. At the end of the 4s of freefall, the 10 N ball will have 5 times the momentum of the 2 N ball

III. At the end of the 4s of free fall, the 10 N ball will have the same kinetic energy as the 2 N ball

IV. The 10 N ball possesses greater inertia than the 2 N ball

NTS 2010
Physics
Forces and Motion
Elimination Tool:

Efficiency of the Carnot’s cycle will be 100% if the temperature of cold reservoir is:

Which of the following has no acceleration:

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

NUMS Mock 1
Physics
Forces and Motion

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

PMC Practice 6
Physics
Electronics
Elimination Tool:

1 kilowatt hour =

NUMS Mock 2
Physics
Work, Power and Energy

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:

Energy difference in balmer series for longest wavelength is

PMC Sample 3
Physics
Atomic Spectra
Elimination Tool:

The slope of distance – time graph will always be:

PMC 2020
Physics
Motion in Two Dimensions
Elimination Tool:

In Nuclear Physics the mass defect is referred to _______.

NTS 2019
Physics
Nuclear Physics
Elimination Tool:

SI unit of electric field is volt/meter which is equivalent to:

NUMS 2019 Reconduct
Physics
Electrostatics
Elimination Tool:

Formula for Horizontal Range of  projectile is

A Black body is?

A balloon Is going upwards with a velocity 12 m/s. it releases a packet when it is at a height of 65 from ground. flow much time the packet will take to reach the ground if g=10 m/s^2?

The physical quantity which produces angular acceleration in the body is

NUMS 2014
Physics
Circular Motion and Momentum
Elimination Tool:

A red colored cloth red light

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:

The basic source of geothermal energy is

When the source moves towards an observer the frequency of waves as perceived by observer:

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:

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:

If Cp = 10 & Cv = 7, then the general gas constant equals:

What is 1 radian in degrees approximately?

PMC Sample 1
Physics
Circular Motion and Momentum
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:

In a pure resistive circuit current and voltage are

Law of heat exchange is used to determine:

NTS 2018
Physics
Heat and Thermodynamics
Elimination Tool:

Electric Generators work on the principle of:

Speed of sound in vacuum is:

If modulated signal frequency is represented by fm, carrier frequency by fc, fmin and fmax represent minimum and maximum values respectively, then the lower sideband refers to the range:

NTS 2016 SMBBMC
Physics
Wave Motion and Sound
Elimination Tool:

Mass of a person is 50 kg. The apparent weight of the person in elevator is double of his real weight. Find the acceleration of the elevator. Consider g = 10 m/s2

Electrons are emitted in the production of X rays by:

NUMS Mock 1
Physics
Atomic Spectra

What is the time period of sin(wt) ?

A constant force acting on a body of mass 5 kg changes its speed from 2 /s to 7 m/s in 10 s the direction of motion of the body remains unchanged. Find the magnitude of the force.

NTS 2013
Physics
Forces and Motion
Elimination Tool:

The ratio of tensile strength to tensile strain is called:

UHS 2012
Physics
Physics of Solids
Elimination Tool: