In a radio receiver the local oscillator frequency is made higher than the incom

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Question
In a radio receiver
Options
A. the local oscillator frequency is made higher than the incoming signal frequency
B. the local oscillator frequency is made lower than the incoming signal frequency
C. the local oscillator frequency is made equal to the incoming signal frequency

Correct Answer

the local oscillator frequency is made higher than the incoming signal frequency

More questions

2. In a step down chopper using pulse width modulation, T_on = 3 x 10^-3 and T_off = 1 x 10^-3 s. The chopping frequency is
Options
A. 333.33
B. 250
C. 500
D. 1000

4. Match the following:

	List I		List II
A.	Wein bridge oscillator	1.	Low output impedance
B.	Voltage shunt feedback amplifier	2.	RF frequency range
C.	Crystal oscillator	3.	Audio frequency range
D.	Current shunt feedback amplifier	4.	High input impedance
		5.	High output impedance

Options
A. A-3, B-1, C-2, D-5
B. A-3, B-5, C-1, D-2
C. A-4, B-3, C-1, D-2
D. A-5, B-1, C-2, D-1

5. For attenuation of high frequencies we should use
Options
A. shunt capacitance
B. series capacitance
C. inductance
D. resistance

6. In a high frequency coaxial line and the length of line characteristic impedance is a function of
Options
A. properties of insulating material only
B. inner and outer conductor radius only
C. both (a) and (b)
D. neither (a) nor (b)

8. From which instant is the turn off time of a thyristor defined
Options
A. when anode voltage becomes zero
B. when anode current becomes zero
C. when both anode voltage and current become zero
D. none of the above

10. A disadvantage of microstrip line as the connections of compared to strip line is that former
Options
A. do not lend themselves to printed circuit
B. are more likely to radiate
C. are bulky
D. are more expensive and complex

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