The Polytechnic Classes(official) 🎓
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A triac is a …………. switch
Anonymous Quiz
65%
Bidirectional
29%
Unidirectional
5%
Mechanical
1%
None of the above
 A diac has  ………….. terminals
Anonymous Quiz
54%
Two
39%
Three
6%
Four
1%
None of the above
A triac can pass a portion of …………… half-cycle through the load
Anonymous Quiz
38%
Only positive
10%
Only negative
52%
Both positive and negative
0%
None of the above
A triac has …………….. semiconductor layers
Anonymous Quiz
26%
Two
49%
Three
23%
Four
2%
Five
The device that does not have the gate terminal is ……………….
Anonymous Quiz
15%
Triac
35%
FET
18%
SCR
32%
Diac
In a UJT, the p-type emitter is ……………. doped
Anonymous Quiz
35%
Lightly
54%
Heavily
9%
Moderately
2%
None of the above
The binary number 10101 is equivalent to decimal number …………..
Anonymous Quiz
16%
19
19%
12
14%
27
51%
21
The universal gate is ………………
Anonymous Quiz
79%
NAND gate
7%
OR gate
7%
AND gate
8%
None of the above
The inverter is ……………
Anonymous Quiz
78%
NOT gate
14%
OR gate
7%
AND gate
1%
None of the above
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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In a transmitter ……………. oscillator is used
Anonymous Quiz
34%
Hartley
27%
RC phase-shift
7%
Wien-bridge
33%
Crystal