The inputs of a NAND gate are connected together. The resulting circuit is ………….
Anonymous Quiz
7%
OR gate
47%
AND gate
42%
NOT gate
3%
None of the above
Digital circuit can be made by the repeated use of ………………
Anonymous Quiz
24%
OR gate
23%
NOT gate
49%
NAND gate
3%
None of the above
When an input signal 1 is applied to a NOT gate, the output is ………………
Anonymous Quiz
68%
0
15%
1
16%
Either 0 & 1
1%
None of the above
In Boolean algebra, the bar sign (-) indicates ………………..
Anonymous Quiz
12%
OR operation
24%
AND operation
60%
NOT operation
4%
None of the above
The resolution of an n bit DAC with a maximum input of 5 V is 5 mV. The value of n is …….
Anonymous Quiz
9%
8
23%
9
63%
10
5%
11
An OR gate has 4 inputs. One input is high and the other three are low. The output is …….
Anonymous Quiz
20%
Low
54%
High
19%
alternately high and low
7%
may be high or low depending on relative magnitude of inputs
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Modulation is done in …………..
Anonymous Quiz
52%
Transmitter
7%
Radio receiver
41%
Between transmitter and radio receiver
0%
None of the above
In a transmitter ……………. oscillator is used
Anonymous Quiz
34%
Hartley
27%
RC phase-shift
7%
Wien-bridge
33%
Crystal
In India, ……………. modulation is used for radio transmission
Anonymous Quiz
52%
Frequency
39%
Amplitude
7%
Phase
2%
None of the above
In an AM wave useful power is carrier by ………….
Anonymous Quiz
20%
Carrier
43%
Sidebands
36%
Both sidebands and carrier
0%
None of the above
In amplitude modulation, bandwidth is ……………. the audio signal frequency
Anonymous Quiz
9%
Thrice
26%
Four times
61%
Twice
4%
None of the above
In amplitude modulation, the ………… of carrier is varied according to the strength of the signal.
Anonymous Quiz
65%
Amplitude
24%
Frequency
8%
Phase
3%
None of the above
Overmodulation (amplitude) occurs when signal amplitude is …………. carrier amplitude
Anonymous Quiz
21%
Equal to
25%
Less than
53%
Greater than
1%
None of the above
In an AM wave, the majority of the power is in …………….
Anonymous Quiz
20%
Lower sideband
42%
Upper sideband
38%
Carrier
0%
None of the above
At 100% modulation, the power in each sideband is ………………… of that of carrier
Anonymous Quiz
36%
50%
17%
40%
19%
60%
27%
25%
Overmodulation results in …………..
Anonymous Quiz
19%
Weakening of the signal
30%
Excessive carrier power
47%
Distortion
4%
None of the above
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