MHT CET 2021 20th September Evening Shift | Moving Charges and Magnetism Question 42 | Physics

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)

$$\frac{2 \mathrm{BA}^{3 / 2}}{\mu_0 \sqrt{\pi}}$$

$$\frac{\mathrm{BA}^{3 / 2}}{\mu_0 \pi}$$

$$\frac{\mu_0 \sqrt{\pi}}{2 \mathrm{BA}^2}$$

$$\frac{2 \mathrm{BA}^2}{\mu_0 \sqrt{\pi}}$$

MHT CET 2021 20th September Evening Shift

MCQ (Single Correct Answer)

-0

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

$$\mathrm{M} \propto \frac{1}{n}$$

$$M \propto n$$

$$M \propto n^2$$

$$M \propto \mathrm{n}^3$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-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

$$\mathrm{\frac{A}{4}}$$

$$\mathrm{\frac{A}{2}}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-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

$$\mathrm{\frac{1}{n}}$$

$$\mathrm{\frac{n}{1}}$$

$$\mathrm{nI}$$

$$\mathrm{n^2I}$$

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