1
MHT CET 2021 20th September Evening Shift
+1
-0

The magnetic field at the centre of a current carrying circular coil of area 'A' is 'B'. The magnetic moment of the coil is ( $$\mu_0=$$ permeability of free space)

A
$$\frac{2 \mathrm{BA}^{3 / 2}}{\mu_0 \sqrt{\pi}}$$
B
$$\frac{\mathrm{BA}^{3 / 2}}{\mu_0 \pi}$$
C
$$\frac{\mu_0 \sqrt{\pi}}{2 \mathrm{BA}^2}$$
D
$$\frac{2 \mathrm{BA}^2}{\mu_0 \sqrt{\pi}}$$
2
MHT CET 2021 20th September Evening Shift
+1
-0

The relation between magnetic moment 'M' of revolving electron and principle quantum number 'n' is

A
$$\mathrm{M} \propto \frac{1}{n}$$
B
$$M \propto n$$
C
$$M \propto n^2$$
D
$$M \propto \mathrm{n}^3$$
3
MHT CET 2021 20th September Morning Shift
+1
-0

If the charge to ratio of an electron is 'A' C/kg, then the gyromagnetic ratio of an orbital electron in C/kg is

A
$$\mathrm{\frac{A}{4}}$$
B
A
C
2A
D
$$\mathrm{\frac{A}{2}}$$
4
MHT CET 2021 20th September Morning Shift
+1
-0

The magnetic field intensity 'H' at the centre of a long solenoid having 'n' turns per unit length and carrying a current 'I', when no material is kept in it, is

A
$$\mathrm{\frac{1}{n}}$$
B
$$\mathrm{\frac{n}{1}}$$
C
$$\mathrm{nI}$$
D
$$\mathrm{n^2I}$$
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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