Electromagnetic Induction & Alternating Currents-LCR Series Circuit [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 1 - 5 of 31

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Question 1

Question MCQ▾

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.

13 V

c.

17 V

d.

5 V

Edit

Passage

Read the passage given below and answer the questions that follow:

A student constructs a series RLC circuit. While operating the circuit at a frequency f she uses an AC voltmeter and measures the potential difference across each device as (∆ VR) = 8.8 V, (∆ VL) = 2.6V and (∆ VC) = 7.4V.

Question 2 (1 of 3 Based on Passage)

Question MCQ▾

The circuit is constructed so that the inductor is next to the capacitor. What result should the student expect for a measurement of the combined potential difference (∆ VL + ∆ VC) across the inductor and capacitor?

Choices

Choice (4)Response

a.

7.8 V

b.

10.0 V

c.

7.4 V

d.

4.8 V

Edit

Question 3 (2 of 3 Based on Passage)

Question MCQ▾

What result should the student expect for a measurement of the amplitude Em of the potential difference across the power supply?

Choices

Choice (4)Response

a.

10.0 V

b.

4.0 V

c.

13.6 V

d.

18.8 V

Edit

Question 4 (3 of 3 Based on Passage)

Question MCQ▾

What will happen to the value of ( ∆ VL ) if the frequency is adjusted to increase the current through the circuit?

Choices

Choice (4)Response

a.

(∆ V L) will decrease.

b.

(∆ VL) will increase.

c.

(∆ V L) will remain the same regardless of any changes to f.

d.

There is not enough information to answer the question.

Edit

Question 5

Question MCQ▾

A series LCR arrangement with XL = 80Ω, XC = 50Ω, R = 40Ω is applied across a. c. source of 200 V. Choose the correct options.

(1) Wattless current = 3.2 A

(2) Power current = 3.2 A

(3) Power factor = 0.6

(4) Impedance of circuit = 50 Ω

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4)Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct

Edit