Home
Class 12
PHYSICS
A long, straight wire carries a current ...

A long, straight wire carries a current `i`. The magnetizing field intensity `H` is measured at a point `P` close to the wire. A long, cylindrical iron rod is brought close to the wire so that the point `P` is at the centre of the rod. The value of `H` at `P` will

A

increase many times

B

decrease many times

C

remain almost constant

D

become zero

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC PROPERTIES OF MATTER

    HC VERMA|Exercise Objective 2|6 Videos

  • MAGNETIC PROPERTIES OF MATTER

    HC VERMA|Exercise Exercises|9 Videos

  • MAGNETIC PROPERTIES OF MATTER

    HC VERMA|Exercise Short Answer|9 Videos

  • MAGNETIC FIELD DUE TO CURRENT

    HC VERMA|Exercise Exercises|61 Videos

  • OPTICAL INSTRUMENTS

    HC VERMA|Exercise Exercises|23 Videos

Similar Questions

Explore conceptually related problems

A long straight wire carries a current of 35A . What is the magnetic of the field vecB at a point 20cm from the wire?

A long straight wire carries a current of 35 A. What is the magnitude of the field vecB at a point 20 cm from the wire?

If a long straight wire carries a current of 40 A, then the magnitude of the field B at a point 15 cm away from the wire is

A long, straight wire carries a current i. Let B_1 be the magnetic field at a point P at a distance d from the wire. Consider a section of length l of this wire such that the point P lies on a perpendicular bisector of the section. Let B_2 be the magnetic field at this point due to this section only. Find the value of d/l so that B_2 differs from B_1 by 1 %.

The segment of wire shown in figure carries a current of i=5 A. The magnetic field (in Tesla) at the point P is

A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity vecV , as shown, the force on the charge is

A straight metal wire of length L is carrying a current i. Calculate the magnetic field intensity due to this wire at a point which is at the same distance from both ends of the rod and equal to length of road.