1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the interference experiment using a biprism, the distance of the slits from the screen is increased by $$25 \%$$ and the separation between the slits is halved. If '$$W$$' represents the original fringewidth, the new fringewidth is

A
2 W
B
2.5 W
C
4 W
D
1.5 W
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two waves are represented by the equation, $$\mathrm{y}_1=\mathrm{A} \sin (\omega \mathrm{t}+\mathrm{kx}+0.57) \mathrm{m}$$ and $$\mathrm{y}_2=\mathrm{A} \cos (\omega \mathrm{t}+\mathrm{kx}) \mathrm{m}$$, where $$\mathrm{x}$$ is in metre and $$\mathrm{t}$$ is in second. What is the phase difference between them?

A
0.57 radian
B
1.0 radian
C
1.57 radian
D
1.25 radian
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

An ideal gas at pressure '$$p$$' is adiabatically compressed so that its density becomes twice that of the initial. If $$\gamma=\frac{c_p}{c_v}=\frac{7}{5}$$, then final pressure of the gas is

A
p
B
2p
C
$$\frac{7}{5}$$p
D
2.63p
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In common emitter amplifier, a change of 0.2 mA in the base current causes a change of 5 mA in the collector current. If input resistance is 2 k$$\Omega$$ and voltage gain is 75, the load resistance used in the circuit is

A
8 k$$\Omega$$
B
4 k$$\Omega$$
C
12 k$$\Omega$$
D
6 k$$\Omega$$
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