Q. 23.9( 36 Votes )
A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?
Current through the wire, I = 35 A
Distance of point P from the wire, d = 20 cm
Using Biot Savart law we can find magnetic field at a distance d from a current carrying conductor.
It is given by:
B = Magnetic field strength
I = current through the coil
�0 is the permeability of free space.
�0 = 4 × π × 10-7 TmA-1
d = distance of point P
By plugging the values in the equation (1), we get
⇒ |B| = 3.5 × 10-5T
In this case the magnetic field at 20 cm away from a current carrying conductor is found to be 3.5 × 10-5T.
Rate this question :
A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 cm from the wire?NCERT - Physics Part-I
Use Biot-Savart law to derive the expression for the magnetic field on the axis of a current carrying circular loop of radius R.
Draw the magnetic field lines due to a circular wire carrying current I.Physics - Board Papers
A circular loop of radius 4.0 cm is placed in a horizontal plane and carries an electric current of 5.0 A in the clockwise direction as seen from above. Find the magnetic field.
(a) at a point 3.0 cm above the center of the loop
(b) at a point 3.0 cm below the center of the loop.
HC Verma - Concepts of Physics Part 2
A circular coil of 200 turns has a radius of 10 cm and carries a current of 2.0 A.
(a) Find the magnitude of the magnetic field vector B at the center of the coil.
(b) At what distance from the center along the axis of the coil will the field B drop to half its value at the center?
(3√4 = 1.5874)HC Verma - Concepts of Physics Part 2
A circular loop of radius r carries a current i. How should a long, straight wire carrying a current 4i be placed in the plane of the circle so that the magnetic field at the center becomes zero?HC Verma - Concepts of Physics Part 2
A horizontal circular loop carries a current that looks clockwise when viewed from above. It is replaced by an equivalent magnetic dipole consisting of a south pole S and a north pole N.HC Verma - Concepts of Physics Part 2
A piece of wire carrying a current of 6.00 A is bent in the form of a circular arc of radius 10.0 cm, and it subtends an angle of 120° at the center. Find the magnetic field B due to this piece of wire at the center.HC Verma - Concepts of Physics Part 2