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Physics

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Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas.

A 4 : 1

B 1 : 1

C 2 : 1

D 1 : 2

A 320 Hz

B 640 Hz

C 160 Hz

D 480 Hz

A F

B F/2

C F/4

D F/8

A – 1.6 × 10–12 coulomb

B – 1.6 × 10–13 coulomb

C – 1.6 × 10 –18 coulomb

D – 1.6 × 10 coulomb

A 100 C m–2

B 200 C m–2

C 300 C m–2

D 400 C m–2

A Decreases

B increases

C remains the same

D becomes zero

A one electron

B 10 –6 electrons

C 106 electrons

D 6.25 × 1012 electrons

A The resistance of each of them increases.

B The resistance of each of them decreases.

C The resistance of copper decreases and that of germanium increases.

D The resistance of copper increases and that of germanium decreases

A repel each other

B not interact with each other

C attract each other

D be deflected normal to the plane containing the two beams.

A zero

B 5 H

C 5000 H

D 5 mH

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What is the ratio of the velocity of sound at 4 atmosphere to that at 1 atmosphere?

The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?

Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________?

A million electron are added to a pith ball. Its charge is________?

A cube of side 5 cm has a charge of 6 C. The surface density of charge is_________?

In bringing an electron towards the second electron, the electrostatic potential energy of the system

How many electrons per second constitute a current of one micro ampere?

A piece of copper and a piece of germanium are cooled from the room temperature down to 77 K.

Two parallel beams of positrons moving in the same direction will________?

An emf of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 to 2 ampere in 1 millisecond. The value of self inductance is_______?