# Electromagnetic Induction & Alternating Currents (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 55 - 62 of 124

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## Passage

In Figure given, there is a conducting loop ABCDEFA, of resistance per unit length placed near a long straight current-carrying wire. The dimensions are shown in the figure. The long wire lies in the plane of the loop. The current in the long wire varies as I = I 0 t.

## Question number: 55 (2 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

### Question

The mutual inductance of the pair is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 56 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

The heat produced in the loop in time t is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 57

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

### Question

A step-down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80%, the current drawn from the line is:

### Choices

Choice (4) Response

a.

3 A

b.

2.4 A

c.

30 A

d.

0.3 A

## Passage

If the voltage in an a c circuit is represented by the eq. , , then

## Question number: 58 (1 of 3 Based on Passage) Show Passage

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

MCQ▾

### Question

RMS value of the voltage is

### Choices

Choice (4) Response

a.

b.

314 V

c.

d.

220 V

## Question number: 59 (2 of 3 Based on Passage) Show Passage

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

MCQ▾

### Question

Average voltage is

### Choices

Choice (4) Response

a.

b.

c.

d.

220 V

## Question number: 60 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Alternating Currents

MCQ▾

### Question

Frequency of ac is

### Choices

Choice (4) Response

a.

b.

50 Hz

c.

75 Hz

d.

## Question number: 61

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

### Question

One 10 V, 60 W bulb is to be connected to 100 V line. The required induction coil has self-inductance of value (f = 50Hz)

### Choices

Choice (4) Response

a.

0.052 H

b.

16.2 mH

c.

2.42 H

d.

1.62 mH

## 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

f Page