Electromagnetic Induction & Alternating Currents-Reactance and Impedance (NEET Physics): Questions 11 - 14 of 14

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Question number: 11

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

In an inductor of inductance L = 100 mH, a current of I = 10A is flowing. The energy stored in the inductor is

Choices

Choice (4) Response

a.

100 J

b.

10 J

c.

1000 J

d.

5 J

Question number: 12

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

An alternating voltage is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is

Choices

Choice (4) Response

a.

500 V

b.

350 V

c.

250 V

d.

300 V

Question number: 13

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Assertion-Reason▾

Assertion (Ꭺ)

Choke coil is preferred over a resistor to adjust current in an ac circuit.

Reason (Ꭱ)

Power factor for inductance is zero.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true

Question number: 14

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 2016

MCQ▾

Question

The potential differences across the resistance, capacitance and inductance are 80V,40V and 100V respectively in an L-C-R circuit. The power factor of this circuit is –

Choices

Choice (4) Response

a.

0.8

b.

1.0

c.

0.4

d.

0.5

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