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

A body of mass $m$ is performing a UCM in a circle of radius $r$ with speed $v$. The work done by the centripetal force in moving it through $\left(\frac{2}{3}\right) \mathrm{rd}$ of the circular path is

A
zero
B
$m v^2 \pi r$
C
$\frac{2 \pi m v^2 r}{3}$
D
$\frac{2 m v^2 \pi}{3}$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is the dimensional formula for electric polarisation?

A
$\left[M^P L^{-2} T^1 I^1\right]$
B
$\left[M^{-1} L^{-2} T^1 I^{-1}\right]$
C
$\left[M^P L^{-1} T^{-1} I^1\right]$
D
$\left[M^1 L^{-2} T^1 I^1\right]$
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The phenomenon of interference is based on

A
conservation of momentum
B
quantum nature of light
C
conservation of energy
D
conservation of charge
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A vector $P$ has $X$ and $Y$ components of magnitude 2 units and 4 units respectively. A vector $Q$ along negative $X$-axis has magnitude 6 units. The vector $(\mathbf{Q}-\mathbf{P})$ will be

A
$4(2 \hat{i}-\hat{j})$
B
$-4(2 \hat{\mathbf{i}}-\hat{\mathrm{j}})$
C
$4(2 \hat{i}+\hat{j})$
D
$-4(2 \hat{i}+\hat{j})$
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