1
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

The extension in a wire obeying Hooke's law is $$x$$. The speed of sound in the stretched wire is $$v$$. If the extension in the wire is increased to $$4 x$$, then the speed of sound in a wire is

A
2.5v
B
2v
C
1.5v
D
v
2
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

Let force $$F=A \sin (C t)+B \cos (D x)$$, where $$x$$ and $$t$$ are displacement and time, respectively. The dimensions of $$\frac{C}{D}$$ are same as dimensions of

A
angular velocity
B
velocity
C
angular momentum
D
velocity gradient
3
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two vectors of same magnitude have a resultant equal to either of the two vectors. The angle between two vectors is

A
$$\cos ^{-1}(-0.5)$$
B
$$\cos ^{-1}(-0.4)$$
C
$$\cos ^{-1}(-0.3)$$
D
$$\cos ^{-1}(-0.6)$$
4
MHT CET 2020 16th October Morning Shift
MCQ (Single Correct Answer)
+1
-0

If there is a change of angular momentum from $$1 \mathrm{j}$$-$$\mathrm{s}$$ to $$4 \mathrm{j}$$-$$\mathrm{s}$$ in $$4 \mathrm{~s}$$, then the torque

A
$$\left(\frac{5}{4}\right) \mathrm{J}$$
B
$$\left(\frac{3}{4}\right) \mathrm{J}$$
C
$$1 \mathrm{~J}$$
D
$$\left(\frac{4}{3}\right) \mathrm{J}$$
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