# Practice Questions of Magnetic Effects of Electric Currents

Chapter 13 of Science Class 10 is “Magnetic Effects of Electric Currents”. Practice Questions [ Extra Questions ] for Magnetic Effects of Electric Currents Class 10 Science Chapter 13 are provided on this page.

Contents

## Class 10 Science Chapter 13 : Magnetic Effects of Electric Currents

These questions covers the majority of topics of the Magnetic Effects of Electric Currents class 10 science chapter 13 like Magnetic Fields, properties of Magnetic Field, Right hand thumb rule, Solenoid, Pattern of magnetic field, Magnetic Field lines , etc.

### Practice Question of Class 10 Science Chapter 13 : Magnetic Effects of electric current (Extra Question Answer )

Ques. 1 : What do you mean by Magnetic Field ?
Answer : The region around a magnet where the effect of magnet can be felt is known as the Magnetic Field.

Ques. 2 : What are the properties of Magnetic line of Force ?
Answer : Properties of Magnetic Line of Forces are –

• They emerge from North Pole and enter the south pole of the magnet
• Two magnet line of force never intersect.
• Their direction inside the magnet is south to north.
• They tend to contract length wise. This explains the attraction between opposite poles.
• They exert lateral pressure on each other. This explains the repulsion between like poles.

Ques. 3 : Explain the Right Hand Thumb Rule.
Answer : If we imagine to hold a current carrying conductor with our right hand in such a way so that our thumb points the direction of the current, the direction in which our fingers are folded represents the direction of magnetic field.

Ques. 4 : What is a Solenoid ?
Answer : A coil of many circular turns of insulated copper wire, wrapped closely in the shape of a cylinder is called a solenoid.

Ques. 5 : What is the patterns of the magnetic field lines around a solenoid ?
Answer : The magnetic field lines of solenoid is like that of a magnetic field lines of a bar magnet.

Ques. 6 : What are magnetic field lines ?
Answer : A field line is a path along which a hypothetical free north pole tend to move.

Ques. 7 : What is an electric Motor ?
Answer : It is a device which converts electrical energy to Mechanical Energy.

Ques. 8 : What is a Generator ?
Answer : A generator is a device which converts the mechanical energy into electrical energy .

Ques. 9 : State the Fleming’s Left hand Rules .
Answer : According to Flemings left hand rule , if we stretch our thumb forefinger and middle finger our left hand in such a way so that they are at right angles to each other . If forefinger is in the direction of magnetic field , middle finger in the direction of electric current, then our thumb will give the direction of motion.

Ques. 10 : Where electric Motor is used ?
Answer : Electric Motor is used in Electric Fan, mixer Mp3 , Electric pump set.

Ques. 11 : What is electromagnetic Induction ?
Answer : The process by which a change in magnetic

Ques. 12 : State Fleming’s Right Hand Rule .
Answer : According to Fleming’s Right Hand Rule, If we stretch our thumb, forefinger and Middle finger of our right hand in such a way so that they are mutually perpendicular to each other. If our forefinger is in the direction of the magnetic field and middle finger in the direction of motion then thumb will give the direction of induced current.

Ques. 13 : What things a commercial magnet use ?
Answer : A commercial magnet use the following things –

• An electromagnet in place of permanent magnet.
• Large number of turns of wire
• A soft iron core

Ques. 14 : What is armature ?
Answer : The coil and soft iron core on which the coil is wounded is called armature. It enhance the power of motor.

Ques. 15 : What is a Galvanometer ?
Answer : A Galvanometer is an instrument which detect the presence of current in an electric circuit.

Ques. 16 : What is a commutator ?
Answer : A commutator is a device that reverse the direction of flow of current.

## Magnetic Effects of Electric Current FAQs

### Q. Where electric Motor is used ?

Ans. Electric Motor is used in Electric Fan, mixer Mp3 , Electric pump set.