Electromagnetic Induction & Alternating Currents (NEET Physics): Questions 62 - 66 of 121

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Question number: 62

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

Assertion-Reason▾

Assertion (Ꭺ)

A capacitor of suitable capacitance can be used in an ac circuit in place of the choke coil.

Reason (Ꭱ)

A capacitor blocks dc and allows ac only.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 63

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

The current in the primary coil of a transformer (assuming no power loss) as shown in fig. will be –

Transformer consist of two coils

Transformer Consist of Two Coils

In figure two coils transformer is shown with 220 Ω resistor. Vp is the primary coil voltage and VC is the secondary coil voltage.

Choices

Choice (4) Response

a.

10 -6 A

b.

1.0A

c.

0.01 A

d.

0.1 A

Question number: 64

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

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.

tan132

b.

tan143

c.

tan125

d.

tan134

Question number: 65

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

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

Choices

Choice (4) Response

a.

i

b.

i3

c.

i

d.

i2

Question number: 66

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

A resistor and a capacitor are connected in series with an ac source. If the potential drop across the capacitor is 5 V and that across resistor is 12 V, applied voltage is,

Choices

Choice (4) Response

a.

12 V

b.

17 V

c.

13 V

d.

5 V

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