Electromagnetic Induction & Alternating Currents-Reactance and Impedance (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 6 - 10 of 14

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Question number: 6

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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Question

A 20 volt ac is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is 12 V, the voltage across the coil is

Choices

Choice (4) Response

a.

16 volt

b.

10 volt

c.

6 volt

d.

8 volt

Question number: 7

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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Question

One 10 V, 60 W bulb is to be connected to 100 V line. The required induction coil has self-inductance of value (f = 50Hz)

Choices

Choice (4) Response

a.

16.2 mH

b.

1.62 mH

c.

2.42 H

d.

0.052 H

Question number: 8

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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Question

A resistance of 300 Ω and an inductance of 1/π henry are connected in series to a ac voltage of 20 volt and 200 Hz frequency. The phase angle between the voltage and current is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 9

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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MCQ▾

Question

Energy stored in an inductor is proportional to (i= current in the inductor)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 10

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

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Question

An inductor (L = 100 mH), a resistor (R = 100Ω) and a battery (E = 100 V) are initially connected in series as shown in the figure. After a long time the battery is disconnected after short circuiting the points A and B. The current in the circuit 1 ms after the short circuit is

Circuit diagram consist of inductor, resistor and battery

Circuit Diagram Consist of Inductor, Resistor and Battery

In figure inductor, resistor and battery connected in series.

Choices

Choice (4) Response

a.

0.1 A

b.

c.

e A

d.

1 A

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