The distance upto which T.V. signals can be received depend upon:
Correct answer: C. Radius of the earth and also height of the antenna
- A. Radius of the earth
- B. Height of the antenna
- C. Radius of the earth and also height of the antenna
- D. None of above
Explanation
The distance upto which T.V. signals D=√ 2hR. Where R =radius of the earth and h = height of the antenna.
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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