1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When certain metal surface is illuminated with a light of wavelength $\lambda$, the stopping potential is $V$, When the same surface is illuminated by light of wavelength $2 \lambda$, the stopping potential is $\left(\frac{V}{3}\right)$. The threshold wavelength for the surface is

A
$\frac{8 \lambda}{3}$
B
$\frac{4 \lambda}{3}$
C
$4 \lambda$
D
$6 \lambda$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following regions of a transistors are, respectively, heavily dopped and lightly dopped?

A
Collector and emitter
B
Base and emitter
C
Emitter and base
D
Emitter and collector
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A hole is drilled half way to the centre of the earth. A body weighs 300 N on the surface of the earth. How much will, it weigh at the bottom of the hole?

A
200 N
B
250 N
C
120 N
D
150 N
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Eight identical drops of water falling through air with uniform velocity of $10 \mathrm{~cm} / \mathrm{s}$ combine to form a single drop of big size, then terminal velocity of the big drop will be

A
80 cm/s
B
10 cm/s
C
30 cm/s
D
40 cm/s
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