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प्रश्न
A coil ABCD mounted on an axle is placed between the poles N and S of a permanent magnet as shown in Figure.
- In which direction will the coil begin to rotate when current is passed through the coil in direction ABCD by connecting a battery at the ends A and D of the coil?
- Why is a commutator necessary for continuous rotation of the coil?
- Complete the diagram with commutator, etc. for the flow of current in the coil?
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उत्तर
- The coil begins to rotate in anticlockwise direction.
- This is because, after half rotation, the arms AB and CD get interchanged, so the direction of torque on coil reverses. To keep the coil rotating in same direction, commutator is needed to change the direction of current in the coil after each half rotation of coil.
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संबंधित प्रश्न
State Fleming’s left-hand rule.
State whether the following statement is true or false
The field at the centre of a long circular coil carrying current will be parallel straight lines.
What concealed do you get from the observation that a current-carrying wire deflects a compass needle placed near it?
State whether the following statement is true or false:
The magnetic field inside a long circular coil carrying current well be parallel straight lines.
Fill in the following blank with suitable words:
For a current-carrying solenoid, the magnetic field is like that of a ...........
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles
State Fleming’s left-hand rule.
A current-carrying conductor of a certain length, kept perpendicular to the magnetic field experiences a force F. What will be the force if the current is increased four times, the length is halved and the magnetic field is tripled?
Assertion (A): A current carrying straight conductor experiences a force when placed perpendicular to the direction of magnetic field.
Reason (R): The net charge on a current carrying conductor is always zero.
