Electromagnetic Induction & Alternating Currents (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 63 - 68 of 124

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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.

b.

c.

d.

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.

b.

c.

d.

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

Question number: 67

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

If instantaneous current is given by amperes, then the r. m. s value of current is

Choices

Choice (4) Response

a.

4 ampere

b.

c.

zero ampere

d.

Question number: 68

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Assertion-Reason▾

Assertion (Ꭺ)

An alternating current does not show any magnetic effect.

Reason (Ꭱ)

Alternating current varies with time.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Both Ꭺ and Ꭱ are false

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