1
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An electron makes a full rotation in a circle of radius $$0.8 \mathrm{~m}$$ in one second. The magnetic field at the centre of the circle is $$\left(\mu_0=4 \pi \times 10^{-7}\right.$$ SI units)

A
$$4 \pi \times 10^{-26} \mathrm{~T}$$
B
$$2 \pi \times 10^{-26} \mathrm{~T}$$
C
$$4 \pi \times 10^{-19} \mathrm{~T}$$
D
$$2 \pi \times 10^{-19} \mathrm{~T}$$
2
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment when a glass plate of refractive index 1.44 is introduced in the path of one of the interfering beams, the fringes are displaced by a distance '$$y$$'. If this plate is replaced by another plate of same thickness but of refractive index 1.66, the fringes will be displaced by a distance

A
$$\frac{3 y}{2}$$
B
$$\frac{2 y}{3}$$
C
$$\frac{5 y}{4}$$
D
$$\frac{4 y}{5}$$
3
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A monoatomic ideal gas initially at temperature '$$\mathrm{T}_1$$' is enclosed in a cylinder fitted with massless, frictionless piston. By releasing the piston suddenly the gas is allowed to expand to adiabatically to a temperature '$$\mathrm{T}_2$$'. If '$$\mathrm{L}_1$$' and '$$\mathrm{L}_2$$' are the lengths of the gas columns before and after expansion respectively, then $$\frac{\mathrm{T}_2}{\mathrm{~T}_1}$$ is

A
$$\frac{\mathrm{L}_1}{\mathrm{~L}_2}$$
B
$$\frac{\mathrm{L}_2}{\mathrm{~L}_1}$$
C
$$\left(\frac{\mathrm{L}_1}{\mathrm{~L}_2}\right)^{2 / 3}$$
D
$$\left(\frac{\mathrm{L}_2}{\mathrm{~L}_1}\right)^{2 / 3}$$
4
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A tuning fork of frequency $$220 \mathrm{~Hz}$$ produces sound waves of wavelength $$1.5 \mathrm{~m}$$ in air at N.T.P. The increase in wavelength when the temperature of air is $$27^{\circ} \mathrm{C}$$ is nearly $$\left(\sqrt{\frac{300}{273}}=1.05\right)$$

A
0.06 m
B
0.10 m
C
0.09 m
D
0.07 m
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