Questions by radhe

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1 answer 107 views

According to Bohr’s postulate, angular momentum of an electron is mvr = \(\frac { nh }{ 2π }\).

asked Nov 12, 2022 in Chapter 5 Magnetism and Matter

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1 answer 146 views

On the basis of magnetic properties, the substances are classified into three

asked Nov 12, 2022 in Chapter 5 Magnetism and Matter

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1 answer 131 views

A 100 µF capacitor is charged with a 50 V source supply. Then source supply is removed and the capacitor

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 127 views

Compare resistance and reactance.

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 145 views

What is the natural frequency of L C circuit ? What is the reactance of this circuit at this frequency

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 88 views

What is wattless current ?

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 96 views

For very high frequency AC supply, a capacitor behaves like a pure conductor. Why ?

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 123 views

The total impedance of a circuit decreases when a capacitor is added in series with L and R. Explain why ?

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 97 views

An electric lamp is connected in series with a capacitor and an AC source is glowing with a certain brightness.

asked Nov 1, 2022 in Chapter13:AC Circuits

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1 answer 120 views

A toroidal ring, having 100 turns per cm of a thin wire is wound on a nonmagnetic metal rod of length 1 m and diameter

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 112 views

The primary and secondary coil of a transformer each have an inductance of 200 × 10-6H.

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 152 views

A long solenoid of length l, cross-sectional area A and having N1 turns (primary coil) has a small coil of N2

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 146 views

An emf of 96.0 mV is induced in the windings of a coil when the current in a nearby coil is increasing

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 145 views

The value of mutual inductance of two coils is 10 mH. If the current in one of the coil changes

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 120 views

Calculate the value of induced emf between the ends of an axle of a railway carriage 1.75 m long traveling

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 173 views

A stiff semi-circular wire of radius R is rotated in a uniform magnetic field B about an axis passing through its ends.

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 66 views

A search coil having 2000 turns with area 1.5 cm2 is placed in a magnetic field of 0.60T. The coil is moved

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 139 views

In a Faraday disc dynamo, a metal disc of radius R rotates with an angular velocity ω about an axis perpendicular

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 103 views

State and explain Lenz’s law in the light of principle of conservation of energy.

asked Nov 1, 2022 in chapter12:Electromagnetic induction

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1 answer 130 views

What do you mean by electromagnetic induction? State Faraday’s law of induction.

asked Nov 1, 2022 in chapter12:Electromagnetic induction