Physics 914 MCQs [All-Courses]

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.

Pair production can take place only with_________________?

A X-rays

B Gamma rays

C UV-rays

D IR-rays

Review Detailed Answer

Correct Answer: Gamma rays

Pair production cannot take place in a vacuum as ________________?

A Mass is not conserved

B Energy is not conserved

C Momentum is not conserved

D The chargee is not conserved

Review Detailed Answer

Correct Answer: Momentum is not conserved

The minimum wavelength of X-rays can further be reduced by _______________?

A Reducing the pressure or cooling the target

B Increasing the temperature of the filament.

C Using a target element of higher atomic number

D Increasing the potential difference between the cathode and the target

Review Detailed Answer

Correct Answer: Increasing the potential difference between the cathode and the target

Alpha particles possess greater penetration power than that of beta particles due to its_____________?

A Smaller ionization power

B Greater ionization power

C Neither greater nor smaller ionization power

D Same ionization power

Review Detailed Answer

Correct Answer: Smaller ionization power

Radiation produced from TV picture tube is_____________?

A B-rays

B X-rays

C Far infrared

D Infrared

Review Detailed Answer

Correct Answer: X-rays

Beta particles ionize an atom_________________?

A Due to the electrostatic force of attraction

B Due to the electrostatic force of repulsion

C Due to a direct collision

D Due to the gravitational force

Review Detailed Answer

Correct Answer: Due to the electrostatic force of repulsion

In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

A he/ev

B he/Vc

C eV/h

D impossible to predict

Review Detailed Answer

Correct Answer: he/ev

Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?

A Chargeless

B Massless

C Highly penetrating

D All of above

Review Detailed Answer

Correct Answer: Highly penetrating

Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?

A A & B

B B & C

C A & C

D A B & C

Review Detailed Answer

Correct Answer: B & C

The charge on beta particle is________________?

A 1

B -1

C +2

D -2

Review Detailed Answer

Correct Answer: 1

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Physics 914 MCQs [All-Courses]

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All Topics 914

Pair production can take place only with_________________?

Pair production cannot take place in a vacuum as ________________?

The minimum wavelength of X-rays can further be reduced by _______________?

Alpha particles possess greater penetration power than that of beta particles due to its_____________?

Radiation produced from TV picture tube is_____________?

Beta particles ionize an atom_________________?

In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?

Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?

The charge on beta particle is________________?