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प्रश्न
State the form of magnetic field lines around a straight current-carrying conductor.
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उत्तर
Magnetic field lines around a straight current-carrying conductor are in the form of concentric circles with centre at the axis of the conductor.
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संबंधित प्रश्न
The magnetic field in a given region is uniform. Draw a diagram to represent it.
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
Observe the following figure:
If the current in the coil A is changed, will some current be induced in the coil B? Explain.
State whether the following statement is true or false:
The magnetic field inside a long circular coil carrying current well be parallel straight lines.
What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?
State and explain the Clock face rule for determining the polarities of a circular wire carrying current.
What type of core should be put inside a current-carrying solenoid to make an electromagnet?
The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of circular wire is:
(a) clockwise
(b) downwards
(c) anticlockwise
(d) upwards
State two ways to increase the force on a current-carrying conductor in a magnetic field.
Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.
State Fleming's left-hand rule. Explain it with the help of labelled diagrams.
The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
45°
60°
90°
180°
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:
a current is passed through coil B by plugging the key?
Explain your answer mentioning the name of the phenomenon involved.
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.
A flat coil ABCD is freely suspended between the pole of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field.
When will coil come to rest?
State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.
The diagram below shows a free conductor AB is kept in a magnetic field and is carrying current from A to B. (To avoid confusion complete path of the circuit is not shown) The direction of the force experienced by the conductor will be:
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?
A copper wire is held between the poles of a magnet
The current in the wire can be reversed. The pole of the magnet can also be changed over. In how many of the four directions shown can the force act on the wire?
