Foundation Science Physics for Class 10 by H C Verma Bharati Bhawan

H C Verma

Chapter 5

Magnetic Effect of Electric Current - all with Video Answers

Educators

Section 1

Very-Short-Answer Questions

Problem 1

How can you find the direction of a magnetic field at a point through which the magnetic line of force is given?

Amna Khalid

Amna Khalid

Numerade Educator

Problem 2

Sketch the shape of magnetic field lines near a straight wire carrying a current.

Amna Khalid

Numerade Educator

Problem 3

How will you show that the magnetic field produced by a current-carrying wire decreases with distance from the wire?

Amna Khalid

Numerade Educator

Problem 4

How is the strength of the magnetic field at a point near a current-carrying wire related to the current?

Amna Khalid

Numerade Educator

Problem 5

A circular wire is carrying a current. Sketch the shape of the magnetic field lines in a plane that is perpendicular to the plane of the wire and passes through its centre.

Amna Khalid

Numerade Educator

Problem 6

A circular loop carrying a current is placed on a horizontal surface. As seen from above, the current is in the clockwise direction. What is the direction of its magnetic field at the centre? What is the direction of the magnetic field at a point outside the surface of the loop?

Amna Khalid

Numerade Educator

Problem 7

A vertical wire is carrying a current in the upward direction. It is placed in a magnetic field pointing towards the east. Find the direction of the force on the wire.

Amna Khalid

Numerade Educator

Problem 8

A beam of electrons can be thought of as an electric current whose direction is opposite the direction of the moving electrons. Suppose you find that an electron beam coming towards you horizontally through a magnetic field gets deflected towards your right. What is the direction of the magnetic $\begin{array}{ll}\text { field that bends the beam?

Ankur S

Numerade Educator

Problem 9

A wire loop is moved into a magnetic field. You have to find the direction of the current in a portion of the loop that is moving perpendicular to the field. Will you use Fleming's left-hand rule or right-hand rule?

Amna Khalid

Numerade Educator

Problem 10

An electric current is passed through a copper wire by connecting its ends to a battery. It is kept between the poles of a strong horseshoe magnet. There is a force on the wire due to the magnet. If you interchange the connections to the positive and negative terminals of the battery, and also the positions of the north and south poles of the magnet, what will be the change in the force on the wire due to the magnet?

Vishal Gupta

Numerade Educator

Problem 11

What is the purpose of Fleming's right-hand rule?

Amna Khalid

Numerade Educator

Problem 12

A motor converts energy from one form to other. Name the two forms in sequence.

Amna Khalid

Numerade Educator

Problem 13

A generator converts energy from one form to other. Name the two forms in sequence.

Amna Khalid

Numerade Educator

Problem 14

Which wire (live, neutral or earth) goes through a switch?

Amna Khalid

Numerade Educator

Problem 15

Are different electric appliances connected in series or parallel in a house?

Amna Khalid

Numerade Educator

Problem 16

What is the colour convention for live, neutral and earth wires?

Amna Khalid

Numerade Educator