You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Physics

Electric Motor

In a DC motor...

Question

In a DC motor, the device which is used to change the direction of current through the coil after every half rotation is called

magnet

No worries! We‘ve got your back. Try BYJU‘S free classes today!

brushes

No worries! We‘ve got your back. Try BYJU‘S free classes today!

armature

No worries! We‘ve got your back. Try BYJU‘S free classes today!

commutator

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
commutator

In a DC motor, the split rings help to change the direction of current through the coil after every half rotation. For this reason, it is also called split ring commutator.

Suggest Corrections

Similar questions

In an electric motor, which of the following remains fixed and which rotates with the coil?

Commutator; Brush

In the figure given below, a coil is placed between two permanent magnets and it is rotated with the help of an axle, on which two rings R1 and R2 are internally attached. B1 and B2 represents metallic brushes. G represents galvanometer.

The current flowing through the circuit reverses direction periodically, such a current is called alternating current. The current can be made direct by ___.

Q. The armature of a DC motor is rotating in the clockwise direction as shown. What is the direction of the magnetic field for the given motor?

Name the device which is used to reverse the direction of current in the coil of a motor .

(A) Choose the correct alternative and rewrite the following.

(1) The device used for producing current is called a _______.

(a) Voltmeter

(b) Ammeter

(d) Generator

(2) At the time of short circuit, the current in the circuit _______.

(a) increases

(b) decreases

(d) increases in steps

(3) The direction of the magnetic field around a straight conductor carrying current is given by _______.

(a) Right hand rule

(b) Fleming’s left hand rule

(d) none of these

(B) Say true or false. If false, write the correct sentence

(1) Magnetic poles exist in pairs.

(2) Magnetic field increases as we go away from a magnet.

(3) Magnetic lines of force always cross each other.

(4) Electric generator is used to generate current.

(1) Loudspeaker, microphone, electric motor, bar magnet.

(2) Armature coil, brushes, commutator, direct current.

(3) Fuse, insulating material, rubber shoes, generator.

(4) Voltmeter, ammeter, galvanometer, thermometer.

Join BYJU'S Learning Program

In a DC motor, the device which is used to change the direction of current through the coil after every half rotation is called

The correct option is D commutator In a DC motor, the split rings help to change the direction of current through the coil after every half rotation. For this reason, it is also called split ring commutator.

The correct option is D
commutator

In a DC motor, the split rings help to change the direction of current through the coil after every half rotation. For this reason, it is also called split ring commutator.