1
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A car sounding a horn of frequency $$1000 \mathrm{~Hz}$$ passes a stationary observer. The ratio of frequencies of the horn noted by the observer before and after passing the car is $$11: 9$$. If the speed of sound is '$$v$$', the speed of the car is

A
$$\mathrm{V}$$
B
$$\frac{\mathrm{v}}{2}$$
C
$$\frac{\mathrm{v}}{5}$$
D
$$\frac{\mathrm{v}}{10}$$
2
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The time period of a simple pendulum inside a stationary lift is '$$T$$'. When the lift starts accelerating upwards with an acceleration $$\left(\frac{\mathrm{g}}{3}\right)$$, the time period of the pendulum will be

A
$$\frac{\sqrt{5}}{2} \mathrm{~T}$$
B
$$\frac{\sqrt{3}}{2} \mathrm{~T}$$
C
$$\frac{2 \mathrm{~T}}{\sqrt{3}}$$
D
$$\frac{2 \mathrm{~T}}{\sqrt{5}}$$
3
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The mutual inductance of a pair of coils, each of '$$N$$' turns, is '$$M$$' henry. If a current of '$$I$$' ampere in one of the coils is brought to zero in '$$t$$' second, the e. m. f. induced per turn in the other coil in volt is

A
$$\frac{\mathrm{MI}}{\mathrm{t}}$$
B
$$\frac{\mathrm{NMI}}{\mathrm{t}}$$
C
$$\frac{\mathrm{NM}}{\mathrm{It}}$$
D
$$\frac{\mathrm{MI}}{\mathrm{Nt}}$$
4
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

To manufacture a solenoid of length $$1 \mathrm{~m}$$ and inductance $$1 \mathrm{~mH}$$, the length of thin wire required is

(cross - sectional diameter of a solenoid is considerably less than the length)

A
0.10 m
B
0.10 km
C
1 km
D
10 km
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