MHT-CET

22. Moving Charges And Magnetism question bank (Physics)

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Q1.

If the temperature of the cold junction of a thermocouple is lowered,then the neutral temperature

(A)

increases

(B)

approaches inversion temperature

(C)

decreases

(D)

remains the same

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Q2.

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

(A)

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

(B)

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

(C)

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

(D)

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

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