Multiple Choice
First communication satellites used frequencies of
A) 6 GHz for uplink
B) 3 GHz for uplink
C) 6 GHz for downlink
D) 5 GHz for downlink
Correct Answer:
Verified
Correct Answer:
Verified
Q15: Current in a circuit if resistance of
Q16: Number density for copper is {{}}<br>A)10<sup>-29</sup> m<sup>-3</sup><br>B)10
Q17: In frequency modulation, amplitude of modulated wave
Q18: A straight line symbol shows the<br>A)fuse<br>B)diode<br>C)connecting lead<br>D)switch
Q19: Current in a circuit when a charge
Q21: High quality music only needs frequencies up
Q22: Energy transferred per unit charge is<br>A)e.m.f<br>B)current<br>C)potential difference<br>D)conventional
Q23: Electric power is related to<br>A)current in component<br>B)potential
Q24: Amplitude of modulated wave is in phase
Q25: Semiconductors have electron number density of order{{}}<br>A)10