In the breakdown region zener behaves like a

PMC Sample 2
Physics
Electronics
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 2020
Physics
Nuclear Physics
Elimination Tool:

P = Irms Vrms Is applicable for

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:

X-rays are used to investigate:

PMC Sample 3
Physics
Dawn of Modern Physics
Elimination Tool:

In an experiment, an object was placed on the principal axis of a convex lens 25 centimetres away from the lens. A real image 4 times the size of the object was obtained. The focal length of the lens is:

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

A fixed mass of an ideal gas absorbs 1000 J of heat and expands under a constant pressure of 20 kPa from a volume of 25 x 10-3 m3 to a volume of 50 x 10-3 m3. What is the change in the internal energy of the gas?

NTS 2017
Physics
Heat and Thermodynamics
Elimination Tool:

Nuclear fission reaction takes place In controlled conditions by the

Which light photon has the least momentum?

PMC Practice 6
Physics
Dawn of Modern Physics
Elimination Tool:

Which unit expresses work per unit charge?

NTS 2017
Physics
Work, Power and Energy
Elimination Tool:

A line normal to the wavefront, showing the direction of the propagation of light is called the:

PMC Practice 2
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

Which statement is universally correct?

Two bodies are projected at an angle of ɑ and (90 – θ) to the horizontal with the same speed. The ratio between their time of flight is:

NUMS 2019 Cancelled
Physics
Motion in Two Dimensions
Elimination Tool:

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

A full wave rectifier is operating from 50 Hz mains, fundamental frequency of ripple will be

PMC Sample 2
Physics
Electronics
Elimination Tool:

Product of R and C is

Which of the following is incorrect?

Initial velocity of the object with which it goes out of the Earth’s gravitational field, is called:

NUMS 2020
Physics
Gravitation
Elimination Tool:

Vector is quantity that ——

PMC Practice 4
Physics
Scalars and Vectors
Elimination Tool:

Gamma rays cause photoelectric emission when their energy is

Angular velocity is measured in

In rotational motion, angular momentum plays a role which is analogous to that played by _____ in linear motion.

NUMS 2017
Physics
Circular Motion and Momentum
Elimination Tool:

Which of the following does not travel in vacuum?

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

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

A steel rod has a length of 15 m at a temperature of 30°C. If the temperature is raised to 45°C. The increase in its length is:

(α= 1.1 x 10-5 K-1)

NTS 2014
Physics
Heat and Thermodynamics
Elimination Tool:

1 light year distance is the:

PMC Practice 5
Physics
Measurements
Elimination Tool:

A generator of e.m.f. 80 V has an internal resistance of 0.04 Ω. If its terminal voltage is 75 V, determine the current.

NTS 2013
Physics
Current Electricity
Elimination Tool:

A 3 kg stone falls from a 20m high platform. Find its falling speed at 10 m height.

NUMS 2020
Physics
Forces and Motion
Elimination Tool:

When a charged particle is projected perpendicular to a magnetic field:

NUMS 2016
Physics
Electrostatics
Elimination Tool:

Species of the same element that have the same atomic number “Z” but have different mass number “A” are called ____ of that element.

NUMS 2017
Physics
Nuclear Physics
Elimination Tool:

The open-circuit test in a transformer is used to measure?

PMC Practice 3
Physics
Electronics
Elimination Tool:

How much angle does the vector 2i+3j makes with y axis.

A conductor carrying a current ‘I’ has length ‘L’. When it is placed in a magnetic field, ‘B’ at 90 degrees , it experiences a force:

NTS 2016 DUHS & JSMU
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Compton shift is maximum at:

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

If placed in contact, the focal length of the combination of two convex lenses of equal focal lengths f,
will be

Two bodies X of mass 4kg  and Y of mass 6 kg have same linear momentum. If the kinetic energy of Y is 48 J then kinetic energy of body X is:

______ is equivalent to AND Gate followed by a NOT Gate.

NUMS 2017
Physics
Electronics
Elimination Tool:

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

NUMS Mock 3
Physics
Nuclear Physics

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:

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.1 m/s2. At the same instant a truck, traveling with a constant speed of 9.2 m/s, overtakes and passes the automobile. How far beyond the traffic signal will the automobile overtake the truck?

NTS 2010
Physics
Motion in Two Dimensions
Elimination Tool:

A wire of resistance R is bent in the form of a circle the resistance between two points on the circumference of the wire and at the end of the diameter of circle is

NUMS 2019 Reconduct
Physics
Current Electricity
Elimination Tool:

A 5 watt LED bulb converts 80% of the power into light photons wavelength 660 nm. What is the number of photons emitted from the bulb in one second.

UHS 2018
Physics
Dawn of Modern Physics
Elimination Tool:

At resonance, the RLC circuit behaves like:

What is angular velocity?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

Which of the following is the pair of isobars?

NUMS Mock 1
Physics
Nuclear Physics

Electric flux Is positive when

Trough of a wave acts as:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

When an applied stress changes the volume, the change in volume per unit volume is known as:

FMDC 2018
Physics
Physics of Solids
Elimination Tool:

According to hooke’s law:

The linear magnification produced by a lens is defined as the ratio of the:

I. Size of the image to the size of object

II. Size of the lens to the size of object

III. Size of the lens to the size of the image

NTS 2013
Physics
Optics, Nature of Light and Optical Instruments
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 product of frequency and time period is equal to:

NUMS 2020
Physics
Wave Motion and Sound
Elimination Tool:

The least distance of distinct vision for a normal eye is

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:

A maintenance crew is working on a section of a three-lane highway with only one lane open to traffic. This result is much slower traffic flow. The cars on this highway behave like:

NUMS 2015
Physics
Fluid Dynamics
Elimination Tool:

A body of mass 4 kg attached to a spring is displaced through 0.04 m from its equilibrium position and then released. If the spring constant is 400 N/m, find the time period of the vibration?

NTS 2016 DUHS & JSMU
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

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

PMC 2020
Physics
Electrostatics
Elimination Tool:

Capacitance increases by

Which one of the following waves needs a medium to travel?

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

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

Energy of sound waves is proportional to:

A cathode ray oscilloscope is displaying an AC signal. If one wave is completed in 2 cm along X- axis and time-base setting is 10 ms/cm, then frequency of AC signal will be:

NUMS 2019 Cancelled
Physics
Wave Motion and Sound
Elimination Tool:

in Damping

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

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

NUMS 2018
Physics
Fluid Dynamics
Elimination Tool:

If the dot product of vectors Is equal to product of their magnitudes, the angle between them

What is 1 radian in degrees approximately?

PMC Sample 1
Physics
Circular Motion and Momentum
Elimination Tool:

Displacement is a:

PMC Practice 2
Physics
Scalars and Vectors
Elimination Tool:

If a certain region’s magnetic field is directed vertically up and a proton enters this field from the left side, it will go _________.

NUMS 2019 Reconduct
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Bragg’s Law for measurement of wavelength à. of i-rays, using crystal lattice planes having distance d between each other, for constructive interference for integral multiple of i is.

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

The fractional change in resistance per kelvin is known as:

NUMS 2016
Physics
Current Electricity
Elimination Tool:

The concept of work function was given by:

PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:

Zeros are always considered significant when they are

If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to
suffer form

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:

Applications of laser is/are:

NTS 2011
Physics
Electromagnetic Waves
Elimination Tool:

Displacement of an object with respect to a constant moving (v) frame in the same direction is:

PMC Sample 1
Physics
Forces and Motion
Elimination Tool:

The target in the X ray unit is given a:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

The wavelength of X-rays is:

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

NTS 2015 SMBBMC
Physics
Circular Motion and Momentum
Elimination Tool:

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

NUMS 2019 Cancelled
Physics
Motion in Two Dimensions
Elimination Tool:

A half-wave rectifier uses:

PMC Practice 13
Physics
Electronics
Elimination Tool:

Nucleus with an excess of neutrons may decay radioactivity with the emission of:

NTS 2017
Physics
Nuclear Physics
Elimination Tool:

In a river flow of water is maximum at

Alpha rays are nuclear radiations. They are in fact same as _____ nuclei.

NUMS 2018
Physics
Nuclear Physics
Elimination Tool:

If current passing through a solenoid is increased, which of the following must increase:

Consider two capacitors with capacitance 2µF and 4µF. With which type of connection will the 4µF capacitor have a greater amount of stored energy than the 2µF capacitor?

PMC Practice 2
Physics
Alternating Current
Elimination Tool:

For the first time in 1914, Henry Moseley used X-rays for the determination of:

NTS 2018
Chemistry
Atomic Spectra
Elimination Tool:

Three resistors R1, R2 and R3 are connected in series. If R1 > R2 > R3, the equivalent resistance will be:

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:

Which of the following is the pair of isobars?

NUMS 2016
Physics
Nuclear Physics
Elimination Tool:

Sky appears blue due to?