Magnetic Effect of Electric Current Class 10 PDF

Magnetic Effect of Electric Current Class 10 PDF Details
PDF Name	Magnetic Effect of Electric Current Class 10 PDF
No. of Pages	32
PDF Size	0.49 MB
Language	English
Category	English
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Magnetic Effect of Electric Current Class 10

Dear users, today we are going to provide a Magnetic Effect of Electric Current Class 10 PDF for all of you. Through our post, students can easily get the Solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current which can very improve their self-confidence in their preparation for the examinations.

Here in this article, we have provided the best reference material for Science subjects for both board and other entrance examinations. These solutions for Class 10 Science, Chapter 13 Magnetic Effects of Electric Current are generally used by every student during their exam preparations. To know more related to this topic you can read ahead.

Magnetic Effect of Electric Current Class 10 PDF

Magnet:

• Magnetic field and magnetic field lines, Magnetic field due to a current-carrying conductor, Right-hand thumb rule, Magnetic field due to current through a circular loop.
• Magnetic field due to current in a solenoid. A magnet is an object that attracts objects made of iron, cobalt and nickel.
• Magnet comes to rest in a North-South direction when suspended freely.

Use of Magnets:

Magnets are used:

• in refrigerators.
• in radio and stereo speakers.
• in audio and video cassette players.
• in children’s toys and;
• on hard discs and floppies of computers.

Properties of Magnet:

• A free suspended magnet always points towards the north and south directions.
• The pole of a magnet which points toward the north direction is called the north pole or north-seeking.
• The pole of a magnet which points toward the south direction is called the south pole or south seeking.
• Like poles of magnets repel each other while unlike poles of magnets attract each other.

Magnetic field:

The area around a magnet where a magnetic force is experienced is called the magnetic field. It is a quantity that has both direction and magnitude, (i.e., Vector quantity).

Magnetic field and field lines:

• The influence of force surrounding a magnet is called a magnetic field. In the magnetic field, the force exerted by a magnet can be detected using a compass or any other magnet.
• The magnetic field is represented by magnetic field lines.
• The imaginary lines of the magnetic field around a magnet are called field lines or field lines of the magnet. When iron fillings are allowed to settle around a bar magnet, they get arranged in a pattern which mimicks the magnetic field lines.
• The field line of a magnet can also be detected using a compass. The magnetic field is a vector quantity, i.e. it has both direction and magnitude.

Magnetic Effect of Electric Current Class 10 Questions and Answers PDF

1. Why does a compass needle get deflected when brought near a bar magnet?

Answer: The compass needle is a small magnet. When the compass needle is brought close to a bar magnet, the magnetic field lines of the compass needle interact with the magnetic field lines of the bar magnet, which causes the compass needle to deflect.

2. Why don’t two magnetic field lines intersect each other?

Answer: If two magnetic field lines intersect then at the point of intersection the compass needle shows two different directions, which is not possible, hence they do not intersect with each other.

3. Choose the correct option.

The magnetic field inside a long straight solenoid-carrying current

a. is zero.

b. decreases as we move towards its end.

c. increases as we move towards its end.

d. is the same at all points.

Answer:

d. is the same at all points

The magnetic field inside a long straight current-carrying solenoid is uniform therefore it is the same at all points.

Magnetic Effect of Electric Current Class 10 Extra Questions and Answers PDF

1. Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)

a. Mass

b. Speed

c. Velocity

d. Momentum

Answer:

(c) and (d)

When a photon enters the region of the magnetic field, it experiences a magnetic force. Due to this the path of the proton becomes circular. As a result, the velocity and the momentum change.

2. In Activity 13.7, how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased; (ii) a stronger horse-shoe magnet is used; and (iii) length of the rod AB is increased?

Answer: A current-carrying conductor when placed in a magnetic field experiences force. The magnitude of this force will increase with the increase in the amount of current, length of conductor and the strength of the magnetic field. Hence, the strength of the magnetic force exerted on the rod AB and its displacement will increase if

• The current in rod AB is increased
• A stronger horseshoe magnet is used
• When the length of the rod AB increases

3. A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field. The direction of the magnetic field is

1. towards south
2. towards east
3. downward
4. upward

Answer:

The direction of the magnetic field can be determined using Fleming’s Left-hand rule. According to the rule, if we arrange our thumb, forefinger and the middle finger of the left-hand right perpendicular to each other, then the thumb points towards the direction of the magnetic force, the middle finger the direction of current and the forefinger the direction of the magnetic field.

Since the direction of a positively charged particle is towards the west, the direction of the current will also be towards the west. The direction of the magnetic force is towards the north, hence the direction of the magnetic field will be upward according to Fleming’s Left-hand rule.

1. State Fleming’s left-hand rule.

Answer:

Fleming’s Left-hand rule states that if we arrange our thumb, forefinger and middle finger of the left hand at right angles to each other, then the thumb points towards the direction of the magnetic force, the forefinger points towards the direction of the magnetic field and the middle finger points towards the direction of the current.

2. What is the principle of an electric motor?

Answer:

The working principle of the electric motor is based on the magnetic effect of current. A current-carrying conductor when placed in a magnetic field experiences force and rotates.

The direction of the rotation of the conductor can be determined by Fleming’s Left-hand rule.

3. What is the role of a split ring in an electric motor?

Answer:

The split ring plays the role of commutator in an electric motor. The commutator reverses the direction of the current flowing through the coil after each half rotation of the coil.

Due to this reversal of current, the coil continues to rotate in the same direction.

1. Explain different ways to induce a current in a coil.

Answer:

Following are the different ways to induce a current in a coil:

• If the coil is moved rapidly between the two poles of the horseshoe magnet, electric current is induced in the coil.
• When a magnet is moved relative to the coil, an electric current is induced in the coil.

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