Advertisements
Advertisements
प्रश्न
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
Advertisements
उत्तर
Clock face rule:
This rule is used to determine the polarity of two faces of a current-carrying circular coil.
According to clock face rule, if we look at one face of the coil through which a current is passing, we have following conclusions:
1. If the current around the face of the coil flows in clockwise direction, that face of the coil will be south pole.
2. If the current around the face of the coil flows in anticlockwise direction, that face of the coil will be north pole.
APPEARS IN
संबंधित प्रश्न
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
What concealed do you get from the observation that a current-carrying wire deflects a compass needle placed near it?
What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same
What happens when a current-carrying conductor is placed in a magnetic field?
Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.
A current flows in a wire running between the S and N poles of a magnet lying horizontally as shown in Figure below:
The force on the wire due to the magnet is directed:
fron N to S
from S to N
vertically downwards
vertically upwards
If the current in a wire is flowing in the vertically downward direction and a magnetic field is applied from west to east, what is the direction of force in the wire?
How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?
A flat coil ABCD is freely suspended between the pole of U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
What happens when a current is passed in the coil?
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?
Name the following diagram and explain the concept behind it.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be Zero.
When current is parallel to a magnetic field, then force experience by the current-carrying conductor placed in a uniform magnetic field is ____________.
What does the direction of thumb indicate in the right-hand thumb rule. In what way this rule is different from Fleming’s left-hand rule?
What do you know about Michael Faraday?
Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':
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.
