The current flows in a telephone line is

(A) sound energy
(B) electric energy
(C) radio energy
(D) mechanical energy

Correct Answer : electric energy
Question Asked : SSC Stenographer Grade 'C' & 'D' Exam 2017
Explanation : The telephone system converts acoustic energy (sound) into electric energy. The electric energy travels along the phone wires and is converted back into acoustic energy at the receiving end. Interference is caused by the tiny imperfections in the wires carrying the electrical pulses.
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Tags : Physics
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