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1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A rectifier is used to

A
convert a.c. to d.c.
B
amplify a weak signal
C
generate intermittent voltage
D
convert d.c. to a.c.
2
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two different logic gates moving output '0' for the inputs (0, 1) and then for (1, 0) are

A
'AND', 'NAND'
B
'NAND', 'NOR'
C
'OR', 'AND'
D
'NOR', 'AND'
3
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The frequency of a given a.c. signal is 'N' Hz. When it is connected to a half wave rectifier, the number of output pulses given by the rectifier in 1 second is

A
$$\mathrm{\frac{N}{4}}$$
B
$$\mathrm{\frac{N}{2}}$$
C
N
D
2N
4
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Silicon and copper are cooled from 300 K to 100 K, the specific resistance (resistivity)

A
increases in both copper and silicon
B
decreases in both copper and silicon
C
decreases in copper and increases in silicon
D
increases in copper and decreases in silicon
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