If the grating element is made 1/10th the resolving power will become

If an electron undergoes transition from 4th to 2nd orbit, then the color of radiations produced will be:

A gas is enclosed in a container fitted with a piston of cross-sectional area of 0.10 m2. The pressure of the gas is maintained at 8000 N/m2. When heat is slowly transferred, the piston is pushed up through a distance of 4.0 cm. If 42 J heat is transferred to the system during the expansion, what is the change in the internal energy of the system?

NTS 2015 DUHS and JSMU
Physics
Work, Power and Energy
Elimination Tool:

If the spring is halved, the new spring constant of each part will be:

Extraterrestial waves are also called:

PMC 2021 Tested
Physics
Electromagnetic Waves
Elimination Tool:

Step up transformer have ________ turns in secondary coil.

PMC Practice 1
Physics
Alternating Current
Elimination Tool:

Centrifugal force of a body depends upon?

The number of LED segments used in a calculator display:

NUMS 2015
Physics
Dawn of Modern Physics
Elimination Tool:

The binding per nucleon of deuteron (21H) and helium nucleus (42He) are 1.1 MeV and 7 MeV respectively. If two deuterons merge to form a single helium nucleus, the energy released will be:

NUMS 2019 Cancelled
Physics
Nuclear Physics
Elimination Tool:

Electron Volt is the unit of:

PMC Sample 1
Physics
Electrostatics
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:

The unit of the product of RC in the charging of a capacitor Is:

Which of the following is not a S.I. base quantity.

NUMS 2018
Physics
Measurements
Elimination Tool:

The photocell is similar to:

PMC Practice 5
Physics
Dawn of Modern Physics
Elimination Tool:

Which one has least value?

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:

The different magnitudes of same physical quantities are measured by comparing them to:

NUMS Mock 1
Physics
Measurements

If the wavelength of K X-ray from Cu is 1.337 x 10-10m, then the energy difference between two levels from which transition results will be:

NUMS 2019 Cancelled
Physics
Atomic Spectra
Elimination Tool:

The phase angle between two points in a medium is 3π/4. If the distance between these points is 20 cm, then the wavelength of the wave is?

NUMS Mock 3
Physics
Wave Motion and Sound

A type of metals containing alloys, ceramics etc., when heated their temperature reaches to a state called Transition temperature state and their resistance reaches to zero. These types of metals are called:

Human body emits which of the following radiation?

• Q.75 Velocity is a

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

PMC Practice 4
Physics
Electromagnetic Waves
Elimination Tool:

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

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 has constant acceleration, what is true about the force applied on it?

NUMS Mock 1
Physics
Forces and Motion

The entropy of the universe always:

NUMS 2016
Physics
Heat and Thermodynamics
Elimination Tool:

The magnifying power of a compound microscope in terms of the magnification of the objective and
magnifying power of the eyepiece is given by

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:

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

If a car collides with a housefly, what will be the magnitude of the force experienced by the housefly?

NTS 2018
Physics
Forces and Motion
Elimination Tool:

A wave passes through a medium; each particle of the medium performs 100 complete vibrations in 5 seconds. What is the frequency of the wave?

PMC Practice 3
Physics
Oscillations and Simple Harmonic Motion
Elimination Tool:

Resistance of RCL series circuit at resonance Is?

In a step-down transformer, the current in the primary coil is ______ than that in the secondary coil.

PMC 2021 Tested
Physics
Alternating Current
Elimination Tool:

A logic gate has four inputs. Its possible input combinations will be:

NUMS 2015
Physics
Electronics
Elimination Tool:

Refrigerator is an example of:

NUMS 2020
Physics
Heat and Thermodynamics
Elimination Tool:

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

PMC Practice 3
Physics
Electronics
Elimination Tool:

If temperature on Kelvin scale Is reduced to half, what would be the effect on the energy of radiations?

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:

The principle of an AC generator is.

NTS 2019
Physics
Alternating Current
Elimination Tool:

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:

The SI unit of magnetic flux is Weber which is equivalent to:

NUMS 2019 Reconduct
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

Moment of inertia of a thin rod of mass m, length l about a line passing through its center is:

NUMS 2019 Cancelled
Physics
Circular Motion and Momentum
Elimination Tool:

When a fluid is incompressible, it means:

FMDC 2018
Physics
Physics of Solids
Elimination Tool:

Resistivity of Hg is ohmmeter

Consider a peak rectifier fed by a 60-Hz sinusoid having a peak value Vp = 100V. Let the load resistance R = 10kΩ . Calculate the fraction of the cycle during which the diode is conducting:

PMC Practice 5
Physics
Electronics
Elimination Tool:

A convex and concave lens of focal length ‘f’ are in contact, the focal length of the combination will be.

In heavy nuclei the number of neutrons is than protons

If a Force F of magnitude 5N makes an angle of 60 with x-axis, the x-component of the vector will
be:

An object of mass 2kg has a velocity of 6m/s. After 8 seconds, its velocity increases to 10 m/s.
Calculate the power of the object

Which type of current passes through extrinsic semiconductors diode?

For one mole of gas, the relation for specific heat capacity at constant pressure ‘Cp’ and at constant volume ‘Cv’ is ________.

NUMS Mock 1
Physics
Heat and Thermodynamics

Value of Wien’s constant is?

A sound wave travels with a speed of 330ms−1 in air. If the wavelength of the wave is 3.3m, then the frequency of the wave is ______.

PMC Sample 2
Physics
Wave Motion and Sound
Elimination Tool:

An object placed in front of a concave mirror at a distance of X cm from the pole gives a 3 times magnified real image. If it is moved a distance of X+5cm, the magnification of the image becomes 2. The focal length of the mirror is:

NUMS 2014
Physics
Optics, Nature of Light and Optical Instruments
Elimination Tool:

The velocity of X rays is equal to that of:

NUMS 2018
Physics
Atomic Spectra
Elimination Tool:

PIV stands for :

PMC 2020
Physics
Alternating Current
Elimination Tool:

The wavelength associated with an electron is of the order of:

PMC 2020
Physics
Wave Motion and Sound
Elimination Tool:

Mass of a body with speed of light approaches to:

Two point charges of +5 C and -12 C attract each other with a force of 1.48 N. charge of -5 C is added to each of these charges. Now the force will be:

NUMS 2015
Physics
Magnetism and Electromagnetic Induction
Elimination Tool:

One complete circle is equal to:

NUMS 2020
Physics
Circular Motion and Momentum
Elimination Tool:

When an observer moves with velocity of light, relative to a timing device at rest, he would notice:

NUMS 2015
Physics
Dawn of Modern Physics
Elimination Tool:

The spin of a photon is:

PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:

A stone dropped from the roof of a building takes 4 s to reach the ground. The height of the building is:

NUMS 2017
Physics
Motion in Two Dimensions
Elimination Tool:

Consider a car is travelling for one hour. Which of the following trips have the same average velocity?

PMC Practice 2
Physics
Scalars and Vectors
Elimination Tool:

.A stone dropped from a certain height can reach the ground in 5 s. It is stopped after 3 seconds of its fall and then allowed to fall again. Find the time taken by the stone to reach the ground for the remaining distance.

NTS 2014
Physics
Motion in Two Dimensions
Elimination Tool:

Spectra corresponding to the sodium vapour lamp is:

PMC Practice 5
Physics
Atomic Spectra
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:

Which of the following has no acceleration:

Which two or more of the following actions would increase the energy stored in a parallel plate capacitor when a constant potential difference is applied across the plates:

PMC Practice 5
Physics
Electronics
Elimination Tool:

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:

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:

The light we see is:

PMC 2021 Tested
Physics
Electromagnetic Waves
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:

How many types of modulations are possible with sinusoidal carrier?

NTS 2016 SMBBMC
Physics
Wave Motion and Sound
Elimination Tool:

What Is the power of a body if 1 N force is acted upon a body have a constant velocity of 10ms-1?

When earthquake occurs. What happens to the entropy of Earth?

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:

Acceleration of a body executing SHM is directed towards:

A spring of force constant 800 N/m has an extension of 5 cm, the work done in extending it from 5 cm to 15 cm

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

If the time period of the oscillation is 20 micro-sec, then what will be the frequency of that oscillating body?

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

Which of the following is an instrument for monitoring radiations:

NUMS Mock 1
Physics
Nuclear Physics

When out of phase waves meet at a point occurs:

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:

Root mean square velocity of a gas having pressure ‘P’ and density ‘ρ’ is given
by:

UHS 2015
Physics
Fluid Dynamics
Elimination Tool:

Which rays are used in LASER?

PMC 2021 Tested
Physics
Electromagnetic Waves
Wave Motion and Sound
Elimination Tool:

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: