HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Physics

Find the equivalent resistance between the terminals of A and B in the network shown in the figure below given that the resistance of each resistor is 10 ohm.

Which of the following statements is correct for diamagnetic materials?

Which of the following statements is correct for diamagnetic materials?

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A rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely. Its period of oscillation is T′, the ratio of T′/T is ______.

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A rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely. Its period of oscillation is T′, the ratio of T′/T is ______.

Choose the correct option:

A magnetising field of 360 Am⁻¹ produces a magnetic flux density (B) = 0.6T in a ferromagnetic material. What is its permeability in Tm A⁻¹?

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A magnetising field of 360 Am⁻¹ produces a magnetic flux density (B) = 0.6T in a ferromagnetic material. What is its permeability in Tm A⁻¹?

What happens to a ferromagnetic material when its temperature increases above curie temperature?

What happens to a ferromagnetic material when its temperature increases above curie temperature?

Answer in brief.

Discuss the Curie law for paramagnetic material.

Answer in brief.

Discuss the Curie law for paramagnetic material.

A paramagnetic gas has 2.0 × 10²⁶ atoms/m with atomic magnetic dipole moment of 1.5 × 10⁻²³ A m² each. The gas is at 27°C.

1. Find the maximum magnetization intensity of this sample.
2. If the gas in this problem is kept in a uniform magnetic field of 3 T, is it possible to achieve saturation magnetization? Why?

A paramagnetic gas has 2.0 × 10²⁶ atoms/m with atomic magnetic dipole moment of 1.5 × 10⁻²³ A m² each. The gas is at 27°C.

1. Find the maximum magnetization intensity of this sample.
2. If the gas in this problem is kept in a uniform magnetic field of 3 T, is it possible to achieve saturation magnetization? Why?

The susceptibility of a paramagnetic material is χ at 27° C. At what temperature its susceptibility be χ/3?

The susceptibility of a paramagnetic material is χ at 27° C. At what temperature its susceptibility be χ/3?

A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 to 10 A in 0.2 s, what is the change of flux linkage with the other coil?

An emf of 96.0 mV is induced in the windings of a coil when the current in a nearby coil is increasing at the rate of 1.20 A/s. What is the mutual inductance (M) of the two coils?

A long solenoid of length l, cross-sectional area A and having N₁ turns (primary coil), has a small coil of N₂ turns (secondary coil) wound about its center. Determine the Mutual inductance (M) of the two coils.

What will be the effect on the position of zero deflection if only the current flowing through the potentiometer wire is decreased?

What will be the energy of each photon in monochromatic light of frequency 5 ×10¹⁴Hz?