Physics MCQs

852 MCQs  (Page 64 of 86)

Attempt Physics Quiz
The blue colour of the sky is due to___________________?
A. Diffraction
B. Reflection
C. Polarization
D. Scattering
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When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?
A. 5000 nm
B. 5000a
C. 500m
D. 2000um
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Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
A. 4 x 10-10 m
B. 2 x 10-10 m
C. 0.02×10-10m
D. 20×10-10m
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Electrical energy is measured in___________________?
A. Watt
B. Horse power
C. Kilo watt
D. Kilowatt hour
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Electrical energy is converted to heat at the rate of___________________?
A. Irt
B. I2r
C. I2rt
D. Vit
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A fuse is placed in series with the circuit to protect against__________________?
A. High power
B. High voltage
C. High current
D. Over heating
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Which one of the following bulbs has the least resistance ?
A. 100 watt
B. 200 watt
C. 300 watt
D. 60 watt
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Optical active crystals rotates the __________________?
A. Vibrating plane
B. Polarization plane
C. Diffraction plane
D. Interference plane
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In double slit experiment we observe _____________________?
A. Interference fringes only
B. Diffraction fringes only
C. Both interference and diffraction fringes
D. Polirized frringes
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Which one of the following properties of light does not change with the nature of the medium ?
A. Velocity
B. Wavelength
C. Amplitude
D. Frequency
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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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