Electromagnetic Induction & Alternating Currents [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 102 - 105 of 215

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Question 102

Question Assertion-Reason▾

Assertion(Ꭺ)

When capacitive reactance is smaller than the inductive reactance in LCR current, e. m. f. leads the current.

Reason(Ꭱ)

The phase angle is the angle between the alternating e. m. f. and alternating current of the circuit.

Choices

Choice (4)Response

a.

Ꭺ is true but Ꭱ is false

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

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

Edit

Question 103

Question MCQ▾

In a series LCR circuit, resistance R = 10 Ω and the impedance Z = 20 Ω . The phase difference between the current and the voltage is,

Choices

Choice (4)Response

a.

90°

b.

45°

c.

60°

d.

30°

Edit

Question 104

Question MCQ▾

A 10 ohm resistance, 5 mH inductance coil and 10 µF capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency

Choices

Choice (4)Response

a.

is halved

b.

is quadrupled

c.

remains unchanged

d.

is doubled

Edit

Question 105

Question 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 false

c.

Ꭺ is false but Ꭱ is true

d.

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

Edit