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

In an ideal step down transformer, out of the following quantities, which quantity increases in the secondary coil?

A
Power
B
Voltage
C
Current
D
Frequency
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

An air column in a pipe, which is closed at one end will be in resonance with a vibrating tuning fork of frequency 264 Hz for various lengths. Which one of the following lengths is not possible? (V = 330 m/s)

A
62.50 cm
B
93.75 cm
C
156.25 cm
D
31.25 cm
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The surface energy of a liquid drop is 'U'. It splits up into 512 equal droplets. The surface energy becomes

A
8 U
B
6 U
C
4 U
D
2 U
4
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.
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