Physics MCQs

852 MCQs  (Page 77 of 86)

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The speed of light will be minimum while passing through ?
A. Vaccum
B. Glass
C. Water
D. Air
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According to Newton sound travel in air under the conditions of_____________________?
A. Adiabatic
B. Isothermal
C. Isobaric
D. Isochoric
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A Stone thrown from the top of a tall building follows a path that is:
A. Circular
B. Made of two straight line segments
C. Hyperbolic
D. Parabolic
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Electric current in a solid metal conductor is caused by the movement of what ?
A. Protons
B. Electrons
C. Metal atoms
D. Metal ions
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The core of a transformer is laminated to reduce energy losses due to__________?
A. Eddy currents
B. Hysteresis
C. Resistance in winding
D. None of these
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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_______?
A. Zero
B. 5 h
C. 5000 h
D. 5 mh
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Two parallel beams of positrons moving in the same direction will________?
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.
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A piece of copper and a piece of germanium are cooled from the room temperature down to 77 K.
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
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How many electrons per second constitute a current of one micro ampere?
A. One electron
B. 10 –6 electrons
C. 106 electrons
D. 6.25 × 1012 electrons
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In bringing an electron towards the second electron, the electrostatic potential energy of the system
A. Decreases
B. Increases
C. Remains the same
D. Becomes zero
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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