Magnetic Effect Of Current NAT Level - 2

# Magnetic Effect Of Current NAT Level - 2

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## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics | Magnetic Effect Of Current NAT Level - 2

Magnetic Effect Of Current NAT Level - 2 for Physics 2022 is part of Topic wise Tests for IIT JAM Physics preparation. The Magnetic Effect Of Current NAT Level - 2 questions and answers have been prepared according to the Physics exam syllabus.The Magnetic Effect Of Current NAT Level - 2 MCQs are made for Physics 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Magnetic Effect Of Current NAT Level - 2 below.
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*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 1

### A charged particle enters a uniform magnetic field with velocity vector at an angle of 45° with the magnetic field. The pitch of the helical path followed by the particle is p. The radius of the helix is given by p/nπ. The value of n is

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 1

The correct answer is: 2

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 2

### A copper wire of diameter 1.6 mm  carries a current  i. The maximum magnetic field due to this wire is 5 × 10–3 T.  The value of i  is :

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 2

Maximum magnetic field is at surface and is given by

20A
The correct answer is: 20

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 3

### The magnetic field at the centre of an equilateral triangular loop of side 2L and carrying a current i  is given by   Find the value of  n  ____.

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 3

Magnetic field at O  is

The correct answer is: 9

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 4

Ratio of magnetic field at the centre of a current carrying coil of radius R and at a distance of 3R on its axis is :

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 4

The desired ratio is

The correct answer is: 31.623

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 5

Same current i = 2A  is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field  B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is :

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 5

∴  Net force on frame =
= (3) (2) (1) (4)    (F = ilB)
= 24 N
The correct answer is: 24

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 6

Equal currents i = 1 A are flowing through the wires parallel to y-axis located at  x = +1mx = +2, x = +4m  etc, but in opposite directions as shown. The magnetic field at origin (in units of   tesla) will be :

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 6

The correct answer is: 1.33

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 7

A conducting ring of mass kg  and radius 0.5 m  is placed on a smooth horizontal plane. The ring carries a current i = 4A. A horizontal magnetic field B = 10 T is switched on at time t = 0 as shown in figure. The initial angular acceleration (in rad/s2) of the ring will be

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 7

Axis of rotation in along i.e., axis of rotation in the y-axis. Moment of inertia about which is

The correct answer is: 125.664

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 8

Two parallel wires carrying equal currents in opposite directions are placed at x = +a  parallel to y-axis with z = 0. Magnetic field at origin O is B1 and at P (2a, 0, 0) is  B2. Then the ratio B1/B2  is :

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 8

Case I : If the currents are in the directions shown in figure. Then

∴ B1/B2 = –3
Case II
: In the case

The correct answer is: -3

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 9

A particle of charge per unit mass α is released from origin with a velocity   in a uniform magnetic field   If the particle passes through (0, y, 0), then y  is equal to  The value of n  is ____.

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 9

The correct answer is: 2

*Answer can only contain numeric values
Magnetic Effect Of Current NAT Level - 2 - Question 10

A charged particle is projected with velocity v0 along positive x-axis. The magnetic field  B  is directed along negative z-axis between x = 0 and  x = L. The particle emerges out (at  x = L) at an angle of 60° with the direction of projection. Find the velocity with which the same particle is projected (at x = 0) along positive x-axis so that when it emerges out (at  x = L), the angle made by it is 30° with the direction of projection is  nv0. Find the value of  n.

Detailed Solution for Magnetic Effect Of Current NAT Level - 2 - Question 10

The correct answer is: 1.732

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