If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V, the current flowing through the circuit is

A60
Ab. 5
Ac. 0.2
Ad. 720
AUser: A transmission system at a radio station uses a/an _______ to convert a direct current into a high frequency alternating current.
Amodulator
Btransmitting antenna
Coscillator
Ddemodulator User: When all parts of a circuit are composed of conducting materials, the circuit is said to be
A...

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hblack112 hblack112 · Answer 1 · 2018-07-11T22:52:34-04:00

Question 2.

A transmission system at a radio station consists of essentially the following devices:

1. An oscillator, which converts a direct current into a high-frequency alternating current.

2. A transmitting antenna, which sends out radio waves having the same frequency as the current supplied by the oscillator.

3. A microphone, which picks up the sound waves and converts them into a suitable electric current with the same pattern as the sound waves.

4. A modulator, which enables the waves produced by the antenna to “carry” the pattern of the sound waves picked up by the microphone.

The answer is C. Oscillator