Physics MCQs: Most Important Questions for Exams

McqsTestz.com has uploaded a comprehensive collection of Physics MCQs covering a wide range of topics including mechanics, thermodynamics, electromagnetism, optics, modern physics, waves, fluids, and more. Perfect for students preparing for exams such as matriculation, intermediate, competitive tests, Lecturer and university-level assessments.

Physics MCQs

How much heat does a 40 W bulb generates in one hour ?

A. 144000J

B. 144J

C. 1.44J

D. 14J

An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?

A. 2KWh

B. 20KWh

C. 6KWh

D. 12KWh

One kilowatt hour is the amount of energy delivered during _______________?

A. one second

B. one day

C. one minute

D. one hour

When same current passes for same time through a thick and thin wire_________________?

A. more heat is produced in thick wire

B. more heat is produced in thin wire

C. no heat is produced in wire

D. less heat is produced in thick wire

A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________?

A. remains the same

B. is doubled

C. is halved

D. becomes zero

Resistance of a conductor depends upon_________________?

A. nature of conductor

B. dimension of conductor

C. physical state of the conductor

D. all of above

All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?

A. same current

B. same current and potential difference

C. different current but same potential difference

D. different current and potential differences

Why should a resistance be introduced in a circuit in series deliberately ?

A. to increase current

B. to decrease current

C. to control current

D. just to give a good look to circuit

If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?

A. 3600C

B. 7200C

C. 1C

D. 2C

Which one of the following materials is useful for making bulb filaments ?

A. constantan

B. nichrome

C. copper

D. tungsten

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