HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Physics

A battery of emf 4 volt and internal resistance 1 Ω is connected in parallel with another battery of emf 1 V and internal resistance 1 Ω (with their like poles connected together). The combination is used to send current through an external resistance of 2 Ω. Calculate the current through the external resistance.

A potentiometer wire has a length of 1.5 m and a resistance of 10 Ω. It is connected in series with the cell of emf 4 Volt and internal resistance 5 Ω. Calculate the potential drop per centimeter of the wire.

A potential drop per unit length along a wire is 5 × 10⁻³ V/m. If the emf of a cell balances against length 216 cm of this potentiometer wire, find the emf of the cell.

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 ______.

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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?

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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?