1
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two rods, one of aluminium and the other of steel, having initial lengths ' $\mathrm{L}_1$ ' and ' $\mathrm{L}_2$ ' are connected together to form a single rod of length $\left(L_1+L_2\right)$. The coefficients of linear expansion of aluminium and steel are ' $\alpha_1$ ' and ' $\alpha_2$ ' respectively. If the length of each rod increases by the same amount, when their temperatures are raised by $\mathrm{t}^{\mathrm{L}} \mathrm{C}$, then the ratio $\frac{L_1}{L_1+L_2}$ will be

A
$\frac{\alpha_2}{\alpha_1}$
B
$\frac{\alpha_1}{\alpha_2}$
C
$\frac{\alpha_2}{\alpha_1+\alpha_2}$
D
$\frac{\alpha_1}{\alpha_1-\alpha_2}$
2
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In an a. c. generator, when the plane of the coil is perpendicular to the magnetic field

A
magnetic flux is zero and induced e.m.f. is maximum.
B
magnetic flux is maximum and induced e.m.f. is zero.
C
both magnetic flux and induced e.m.f. are maximum.
D
both magnetic flux and induced e.m.f. are zero.
3
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two circular metal plates each of radius ' $r$ ' are kept parallel to each other distance ' $d$ ' apart. The capacitance of the capacitor formed is ' $\mathrm{C}_1$ '. If the radius of each of the plates is increased to $\sqrt{2}$ times the earlier radius and their distance of separation decreased to half the initial value, the capacitance now becomes ' $\mathrm{C}_2$ '. The ratio of the capacitances $\mathrm{C}_1: \mathrm{C}_2$ is

A
$1: 1$
B
$1: 2$
C
$1: 4$
D
$4: 1$
4
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Ratio of radius of gyration of a circular disc to that of circular ring each of same mass and radius around their respective axes is

A
$\sqrt{2}: 1$
B
$\sqrt{2}: \sqrt{3}$
C
$\sqrt{3} : \sqrt{2}$
D
$1: \sqrt{2}$
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