Advertisements
Advertisements
प्रश्न
State and explain the clock-face rule for determining the polarities of a circular wire carrying current.
Advertisements
उत्तर
This rule is used to determine the polarity of two faces of a current-carrying circular coil.
According to the clock-face rule, if we look at one face of the coil through which a current is passing, we have the following conclusions:
- If the current around the face of the coil flows in a clockwise direction, that face of the coil will be the south pole.
- If the current around the face of the coil flows in an anticlockwise direction, that face of the coil will be north pole.
संबंधित प्रश्न
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.
State qualitatively the effect of inserting an iron core into a current-carrying solenoid.
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
The magnetic field lines in the middle of the current-carrying solenoid are?
(a) circles
(b) spirals
(c) parallel to the axis of the tube
(d) perpendicular to the axis of the tube
A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should passed in the conductor:
(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
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?
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?
State whether a magnetic field is associated or not around a moving charge.
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?
