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Light beam which is highly directional, is called :
Answer: D. Laser Light beam which is highly directional, is called laser.
Answer: D. Laser
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Infra-red spectrum lies between:
Answer: A. Radiowave and microwave region Infra-red spectrum lies between radiowave and microwave region.
Answer: A. Radiowave and microwave region
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The electromagnetic waves used in the telecommunication are:
Answer: B. Infra-red The electromagnetic waves used in the telecommunication are infra-red.
Answer: B. Infra-red
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Which has the longest wavelength ?
Answer: C. Ultraviolet ray Ultra-violet ray has the longest wavelength.
Answer: C. Ultraviolet ray
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Among the following, longest wave is:
Answer: A. Radiowave Among the following, longest wave is radiowave.
Answer: A. Radiowave
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Red light differs from blue light in its v
Answer: B. Frequency Red light differs from blue light in its frequency.
Answer: B. Frequency
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An electric charge in uniform motion produces:
Answer: C. Both electric and magnetic fields An electric charge in uniform motion produces both electric and magnetic fields.
Answer: C. Both electric and magnetic fields
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Electromagnetic waves are produced due to:
Answer: A. An accelerating charge Electromagnetic waves are produced due to an accelerating charge.
Answer: A. An accelerating charge
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The speed of electromagnetic waves is independent of:
Answer: C. Intensity The speed of electromagnetic waves is independent of intensity.
Answer: C. Intensity
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What determines the average kinetic energy of the molecules of any gas?
a. Temperature determines the average kinetic energy of the molecules of any gas.
a. Temperature determines the average kinetic energy of the molecules of any gas.
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