NEET  >  Test: Magnetic Field

# Test: Magnetic Field

Test Description

## 10 Questions MCQ Test Physics Class 12 | Test: Magnetic Field

Test: Magnetic Field for NEET 2023 is part of Physics Class 12 preparation. The Test: Magnetic Field questions and answers have been prepared according to the NEET exam syllabus.The Test: Magnetic Field MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Magnetic Field below.
Solutions of Test: Magnetic Field questions in English are available as part of our Physics Class 12 for NEET & Test: Magnetic Field solutions in Hindi for Physics Class 12 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Magnetic Field | 10 questions in 10 minutes | Mock test for NEET preparation | Free important questions MCQ to study Physics Class 12 for NEET Exam | Download free PDF with solutions
 1 Crore+ students have signed up on EduRev. Have you?
Test: Magnetic Field - Question 1

### What is the angle of dip at a place where the horizontal component of the earth’s magnetic field is equal to the vertical component?

Detailed Solution for Test: Magnetic Field - Question 1

The angle of dip is given by:

δ = tan−1(B​/ Bh​)

where Bv​ = vertical component of earth's magnetic field & B= horizontal components of earth's magnetic field
Here, Bv ​= Bh
► δ = tan−1(1) = 45o

Test: Magnetic Field - Question 2

### How can a magnetic field be produced?

Detailed Solution for Test: Magnetic Field - Question 2

An electric current as well as the permanent magnet produces a magnetic field whereas a temporary magnet fails to do so.

Test: Magnetic Field - Question 3

### Which one of the Maxwell’s laws leads to the conclusion that there are no magnetic field loops that are not closed?

Detailed Solution for Test: Magnetic Field - Question 3

Gauss’s law for magnetism states that no magnetic monopoles exist and that the total flux through a closed surface must be zero.

Test: Magnetic Field - Question 4

What is the relation between dipole moment pm, volume of bar magnet V and intensity of magnetization M?

Detailed Solution for Test: Magnetic Field - Question 4

Magnetization is the net dipole moment aligned per unit volume.

M = p/ V

Test: Magnetic Field - Question 5

If we place a bar magnet in the magnetic meridian with its north pole towards geographic north, the neutral point will be:

Detailed Solution for Test: Magnetic Field - Question 5
• If we place a bar magnet in the magnetic meridian with its north pole towards the geographic north, the neutral point will be on the equatorial line of the magnet.
• If the north pole of the magnet points towards the geographical north, the fields of the magnet and the earth will point in opposite directions along the equatorial line of the magnet we get two neutral points on the equatorial line which are equidistant from the axis of the magnet.
Test: Magnetic Field - Question 6

Which combination of magnetic field lines and poles shows two magnets repelling each other?

Detailed Solution for Test: Magnetic Field - Question 6
• The discovery that one particular pole of a magnet orients northward, whereas the other pole orients southward allowed people to identify the north and south poles of any magnet.
• It was then noticed that the north poles of two different magnets repel each other, and likewise for the south poles. Conversely, the north pole of one magnet attracts the south pole of other magnets.
• This situation is analogous to that of electric charge, where like charges repel and unlike charges attract. In magnets, we simply replace the charge with a pole: Like poles repel and unlike poles attract.
Test: Magnetic Field - Question 7

Magnetic field strength due to a short bar magnet on its axial line at a distance x is B. What is its value at the same distance on the equatorial line?

Detailed Solution for Test: Magnetic Field - Question 7

The magnetic field at any axial point is given by, B =  2μo/ 4πx3
Similarly, the field at any equatorial point is given by, B = μo/ 4πx3
Thus, the field at any equatorial point is half of what it is at an axial point.

Test: Magnetic Field - Question 8

When the switch is closed a magnetic field is produced by the coil. Which option shows the shape of the field?

Detailed Solution for Test: Magnetic Field - Question 8
• The apparatus used by Faraday to demonstrate that magnetic fields can create currents is illustrated in Figure B.
• When the switch is closed, a magnetic field is produced in the coil on the top part of the iron ring and transmitted to the coil on the bottom part of the ring.
So, B is the correct option.
Test: Magnetic Field - Question 9

If the magnet is suspended at an angle 30° to the magnetic meridian, the dip needle makes an angle 60o with the horizontal. What is the true dip?​

Detailed Solution for Test: Magnetic Field - Question 9

Angle of dip, δ = 30º
► tanδ′ = tanδ / cosθ
► tanδ = (tan 60º) * (cos30°) = (√3) * (√3 / 2) = 3 / 2
∴ Real dip, δ′ = tan−1 (3/2)

Test: Magnetic Field - Question 10

A compass has a small balanced pointer that always points North-South. This is because:

Detailed Solution for Test: Magnetic Field - Question 10
• A compass has a small magnet inside it with its north pole towards the tip of the needle.
• This magnet aligns itself with the earth's magnetic field thus points towards the magnetic south and geographical north.

## Physics Class 12

157 videos|452 docs|213 tests
 Use Code STAYHOME200 and get INR 200 additional OFF Use Coupon Code
Information about Test: Magnetic Field Page
In this test you can find the Exam questions for Test: Magnetic Field solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Magnetic Field, EduRev gives you an ample number of Online tests for practice

## Physics Class 12

157 videos|452 docs|213 tests

### How to Prepare for NEET

Read our guide to prepare for NEET which is created by Toppers & the best Teachers