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Relative Strength of Magnetic Field

State the eff...

Question

State the effect on the strength of magnetic field produced at a point near a straight conductor if the electric current flowing through it increases

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Solution

The magnetic field produced by a current carrying conductor is directly proportional to current (I) passing through it is inversely proportional to the square of the distance (R) from it. It will increase with increase with current and vice versa.

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Q. (a) How is the strength of the magnetic field at a point near a straight conductor related to the strength of the electric current flowing in the conductor ?
(b) With the help of a diagram describe an activity to show that a straight conductor carrying current produces a magnetic field around it. State the rule which may be used to determine the direction of magnetic field thus produced.
(c) Why do two magnetic field lines never intersect each other ? Explain.

Q. (a) what do you mean by magnetic field lines? Write two characteristics of magnetic field lines.
(b) State the rule for direction of magnetic field produced around a current carrying straight conductor. Draw a sketch of the pattern of field lines due to current flowing through a straight conductor.

Q. State whether true or false :

The pattern of the magnetic field around a conductor due to electric current flowing through it depends on the shape of the conductor.

Q. (a) What is a magnetic field? How can the direction of magnetic field lines at a place be determined?
(b) State the rule for the direction of the magnetic field produced around a current-carrying conductor. Draw a sketch of the pattern of field lines due to a current flowing through a straight conductor.

Q. If the strength of the magnetic field produced

10 c m

away from a infinitely long straight conductor is

10^{- 5} {weber/m}^{2}

the value of the current flowing in the conductor will be:

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