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Magnetic Field Due to Straight Current Carrying Conductor

for the hollo...

Question

for the hollow thin cylindrical current carrying pipe which statement is correct 1.magnetic field inside the pipe is not zero 2.magnetic field outside the pipe is zero 3.electric field outside the pipe is zero 4.electric field on the surface of pipe is

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Q. A long thin wooden cylindrical pipe of radius R, carrying a uniform surface charge density

σ

, is rotating about its axis with an angular velocity

ω

that increases slowly with time as

ω = k t

k

is constant. Which of the statements are correct for region inside the pipe?

Q. Assertion: A current

I

flows along the length of an infinitely long, straight, thin-walled pipe. Then the magnetic field at all points inside the pipe is the same but not zero.

Reason: The whole pipe can be supposed to be made of thin rings. The magnetic field on the axis of the ring is

\frac{μ_{0} i}{2 a}

. So, the total field is not zero.

Q. Match the column

I

I I

Column $I$	Column $I I$
$a .$ Magnetic field inside a long straight solenoid is	$p .$ not constant
$b .$ Magnetic field inside a toroidal solenoid is	$q .$ zero
$c .$ Magnetic field inside a conducting hollow pipe having current parallel to its axis is	$r .$ constant
$d .$ Magnetic field due to current carrying wire on its surface is	$s .$ maximum

Q. A hollow tube is carrying an electric current along its length distributed uniformly over its surface. The magnetic field
(a) increases linearly from the axis to the surface
(b) is constant inside the tube
(c) is zero at the axis
(d) is zero just outside the tube.

Q. If a long hollow copper pipe carries a direct current

I

along length of pipe, the magnetic field due to the hollow conductor will exist

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