Physics
Quality of transmission depends upon

Nature of medium only
Nature of signal only
Both (A) and (B)
Neither A nor B

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Physics
Circuit breaker usually operate under

Sub-transient state of short-circuit current
After D. C. component has ceased
Transient state of short-circuit current
Steady state of short-circuit current

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Physics
RADAR is used for:

locating submerged submarines.
locating geostationary satellites.
receiving a signals in a radio receiver.
detecting and locating the position of objects such as Aeroplanes.

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