1
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
2
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
3
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.
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two stars 'P' and 'Q' emit yellow and blue light respectively. The relation between their temperatures $$\left(\mathrm{T}_{\mathrm{P}}\right.$$ and $$\left.\mathrm{T}_{\mathrm{Q}}\right)$$ is

A
$$\mathrm{T_P=T_Q}$$
B
$$\mathrm{T}_{\mathrm{P}}=\frac{\mathrm{T}_{\mathrm{Q}}}{2}$$
C
$$\mathrm{T}_{\mathrm{P}}>\mathrm{T}_{\mathrm{Q}}$$
D
$$\mathrm{T}_{\mathrm{P}}<\mathrm{T}_{\mathrm{Q}}$$
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