State the form of magnetic field lines around a straight current-carrying conductor.

Academic Physics NCERT Class 10

Magnetic field lines around a straight current-carrying conductor form a concentric circle whose centres lie on the conductor.

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Updated on: 10-Oct-2022

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Magnetic Field around a Current Carrying Conductor
(a) Draw a sketch to show the magnetic lines of force due to a current-carrying straight conductor.(b) Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.
State the rule to determine the direction of a $(i)$. magnetic field produced around a straight conductor-carrying current,$(ii)$. the force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and$(iii)$. current induced in a coil due to its rotation in a magnetic field.
Name the rule for finding the direction of magnetic field produced by a straight current-carrying conductor.
Force on a Current Carrying Conductor in a Magnetic Field
Draw the pattern of magnetic field lines produced around a current-carrying straight conductor passing perpendicularly through horizontal cardboard. State and apply the right-hand thumb rule to mark the direction of the field lines. How will the strength of the magnetic field change when the point where magnetic field is to be determined is moved away from the straight conductor ? Give reason to justify your answer.
State whether the following statement is true or false:The magnetic field inside a long circular coil carrying current will be parallel straight lines.
What happens when a current-carrying conductor is placed in a magnetic field?
The shape of the earth’s magnetic field resembles that of an imaginary:(a) U-shaped magnet (b) Straight conductor carrying current (c)Current-carrying circular coil (d) Bar magnet
(a) 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.(b) State two ways to increase the force on a current-carrying conductor in a magnetic field. (c) Name one device whose working depends on the force exerted on a current-carrying coil placed in a magnetic field.
When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
Draw magnetic field lines around a bar magnet.
The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. If the conductor was held along the east-west direction, what will be the direction of current through it?
What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?
(a) What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.(b) Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles. (c) What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate? (d) List three ways in which the magnetic field strength of a current-carrying solenoid can be increased? (e) What type of core should be put inside a current-carrying solenoid to make an electromagnet?

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