Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
It is given that the current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor from top towards bottom. It is concluded by applying right-hand thumb rule.
APPEARS IN
संबंधित प्रश्न
State Fleming’s left hand rule.
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?
What happens when a current-carrying conductor is placed in a magnetic field?
In a statement of Fleming's left-hand rule, what do the following represent?
(a) direction of centre finger.
(b) direction of forefinger.
(c) direction of thumb.
A horizontal wire carries a current as shown in Figure below between magnetic poles N and S:
Is the direction of the force on the wire due to the magnet:
(a) in the direction the current
(b) vertically downwards
(c) opposite to the current direction
(d) vertically upwards
In the simple electric motor of figure given below, the coil rotates anticlockwise as seen by the eye from the position X when current flows in the coil
Is the current flowing clockwise or anticlockwise around the coil when viewed from above?
force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if:
the current is stopped by removing the plug from the key?
Explain your answer mentioning the name of the phenomenon involved.
State condition when magnitude of force on a current carrying conductor placed in a magnetic field is zero?
State two ways to increase the speed of rotation of a D.C. motor.
Differentiate between conductors and insulators.
A current flows in a wire running between the S and N poles of a magnet lying horizontally as shown in the figure below:
The force on the wire due to the magnet is directed ____________.
A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act ____________.
For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement 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?
Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Fleming’s left-hand rule help us to find the direction of the force acting on the current carrying conductor?
Assertion (A): A magnetic field exerts a force on a moving charge in the same direction as the direction of the field itself.
Reason (R): The direction of force is given by 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?
Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':
