1
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A black body radiates maximum energy at wavelength '$$\lambda$$' and its emissive power is 'E' Now due to change in temperature of that body, it radiates maximum energy at wavelength $$\frac{2 \lambda}{3}$$. At that temperature emissive power is

A
$$\frac{81}{16}$$
B
$$\frac{27}{32}$$
C
$$\frac{18}{10}$$
D
$$\frac{9}{4}$$
2
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In meter bridge experiment, null point was obtained at a distance '$$l$$' from left end. The values of resistances in the left and right gap are doubled and then interchanged. The new position of the null point is

A
$$(100-l)$$
B
$$(100-2 l)$$
C
$$(100-3 l)$$
D
$$\left(100-\frac{l}{2}\right)$$
3
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic field at the centre of a circular coil of radius '$$R$$', carrying current $$2 A$$ is '$$B_1$$'. The magnetic field at the centre of another coil of radius '$$3 R$$' carrying current $$4 A$$ is '$$B_2$$'. The ratio $$B_1:B_2$$ is

A
$$1: 2$$
B
$$2: 1$$
C
$$2: 3$$
D
$$3: 2$$
4
MHT CET 2023 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If a capacitor of capacity $$900 ~\mu \mathrm{F}$$ is charged to $$100 \mathrm{~V}$$ and its total energy is transferred to a capacitor of capacity $$100 ~\mu \mathrm{F}$$, then its potential will be

A
$$30 \mathrm{~V}$$
B
$$200 \mathrm{~V}$$
C
$$300 \mathrm{~V}$$
D
$$400 \mathrm{~V}$$
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