# Electromagnetic Induction & Alternating Currents-Induced EMF and Current (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 5 - 9 of 12

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

## Passage

In the figure shown, the rod has a resistance R, the horizontal rails have negligible friction. Magnetic field of intensity B is directed perpendicular into the plane of paper. A cell of e. m. f. E and negligible internal resistance is connected between points a and b. The rod is initially at rest.

## Question number: 5 (2 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

The current when the rod attains its terminal speed is

### Choices

Choice (4) Response

a.

b.

Zero

c.

d.

## Question number: 6 (3 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

The velocity of the rod as a function of time t (where ) is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 7

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

5.5 x 10 -4 magnetic flux lines are passing through a coil of resistance 10 ohm and number of turns 1000. If the number of flux lines reduces to 5 x 10 -5 in 0.1 sec. Then

(1) The electromotive force induced in the coil is 5V

(2) The electromotive force induced in the coil is 5 x 10 -4 V

(3) The current induced in the coil is 0.5 A

(4) The current induced in the coil is 10 A

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

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1,2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

## Question number: 8

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

A solenoid has an inductance of 50 mH and a resistance of 0.025 Ω. If it is connected to a battery, how long will it take for the current to reach one half of its final equilibrium value?

### Choices

Choice (4) Response

a.

1.38 sec

b.

1.38 ms

c.

0.23 sec

d.

1.34 sec

## 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: 9 (1 of 2 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

The e. m. f. induced in the closed loop is

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page