Electromagnetic Induction & Alternating Currents [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 38 - 41 of 215

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Question 38

Question MCQ▾

In the circuit, E = 10 volt, R1 = 5.0 ohm, R2 = 10 ohm and L = 5.0 henry. The current just after the switch S is pressed is.

A Diagram Consists of Resistors, Inductor, Switch and Battery

Choices

Choice (4)Response

a.

2.0A

b.

6.0A

c.

5.0A

d.

3.0A

Edit

Question 39

Question MCQ▾

An alternating current of frequency is flowing in a circuit containing a resistor of resistance R and a choke of inductance L in series. The impedance of this circuit is

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 40

Question Assertion-Reason▾

Assertion(Ꭺ)

The alternating current lags behind the emf by a phase angle of , when ac flows through an inductor.

Reason(Ꭱ)

The inductive reactance increases as the frequency of ac source decreases.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is 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

Question 41

Question MCQ▾

Large transformer, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is due to

(1) Heating effect of current

(2) Hysteresis loss

(3) Chemical effect of current

(4) Magnetic effect of current

Select the correct answers and mark it according to the following

Choices

Choice (4)Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Edit