The magnetic field inside a long straight solenoid carrying current :

(a) is zero

(b) decreases as we move towards its end.

(c) increases as we move towards its end.

(d) is the same at all points.

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Solution

(d) The magnetic field inside a long straight current-carrying solenoid is uniform which is represented by parallel lines. Hence it's magnitude in teslas (T) is found to be same at all points.

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Question 3
Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current
(a) is zero
(b) decreases as we move towards its end
(c) increases as we move towards its end
(d) is the same at all points

The magnetic field inside a long straight solenoid carrying current is the same at all points.

Q. Question 10
The strength of magnetic field inside a long current carrying straight solenoid is

(a) more at the ends than at the centre
(b) minimum in the middle
(c) same at all points
(d) found to increase from one end to the other

Q. Match the column

I

with column

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 soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:

(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same

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The magnetic field inside a long straight solenoid carrying current : (a) is zero (b) decreases as we move towards its end. (c) increases as we move towards its end. (d) is the same at all points.

(d) The magnetic field inside a long straight current-carrying solenoid is uniform which is represented by parallel lines. Hence it's magnitude in teslas (T) is found to be same at all points.

The magnetic field inside a long straight solenoid carrying current :

(a) is zero

(b) decreases as we move towards its end.

(c) increases as we move towards its end.

(d) is the same at all points.