Advertisements
Advertisements
प्रश्न
A current-carrying conductor is placed perpendicularly in a magnetic field. Name the rule which can be used to find the direction of force acting on the conductor.
Advertisements
उत्तर
When a current-carrying conductor is placed perpendicular to a magnetic field, Fleming's left-hand rule can be used to find the direction of force acting on the conductor.
APPEARS IN
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 whether the following statement is true or false:
The magnetic field inside a long circular coil carrying current well be parallel straight lines.
Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.
Draw the magnetic lines of force due to a circular wire carrying current.
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find the direction of magnetic field.
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
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.
State two ways to increase the force on a current-carrying conductor in a magnetic field.
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.
How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?
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?
The following diagram shows two parallel straight conductors carrying the same current. Copy the diagram and draw the pattern of the magnetic field lines around them showing their directions. What is the magnitude of the magnetic field at a point 'X' which is equidistant from the conductors? Give justification for your answer.
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be Zero.
What do you know about Michael Faraday?
Which of the following pattern correctly describes the magnetic field around a long straight wire carrying current?
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.
If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.
A copper conductor is placed over two stretched copper wires whose ends ate connected to a D.C. supply as shown in the diagram.
- What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
- Name the law used to find these polarities.
