Recent questions in 12th Science Maharashtra Board

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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 by radhe (2.2k points)

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Compare resistance and reactance.

asked Nov 1, 2022 in Chapter13:AC Circuits by radhe (2.2k points)

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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 by radhe (2.2k points)

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What is wattless current ?

asked Nov 1, 2022 in Chapter13:AC Circuits by radhe (2.2k points)

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

asked Nov 1, 2022 in Chapter13:AC Circuits by radhe (2.2k points)

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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 by radhe (2.2k points)

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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 by radhe (2.2k points)

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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 by radhe (2.2k points)

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

asked Nov 1, 2022 in chapter12:Electromagnetic induction by radhe (2.2k points)

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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 by radhe (2.2k points)

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1 answer 156 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 by radhe (2.2k points)

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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 by radhe (2.2k points)

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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 by radhe (2.2k points)

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1 answer 182 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 by radhe (2.2k points)

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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 by radhe (2.2k points)

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1 answer 149 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 by radhe (2.2k points)

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

asked Nov 1, 2022 in chapter12:Electromagnetic induction by radhe (2.2k points)

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

asked Nov 1, 2022 in chapter12:Electromagnetic induction by radhe (2.2k points)

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The flux rule is the terminology that Feynman used to refer to the law relating magnetic flux to emf.

asked Nov 1, 2022 in Chapter11:Magnetic Materials by radhe (2.2k points)

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1 answer 111 views

Which property of soft iron makes it useful for preparing electromagnet?

asked Nov 1, 2022 in Chapter11:Magnetic Materials by radhe (2.2k points)

Recent questions in 12th Science Maharashtra Board

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