Question

20
Read the following and answer an 4 questions from 200 to 20 (3)
A coil of many circular turns of insulated copper wire wound on a cylindrical
insulating body (i.e. cardboard etc.) such that its length is greater than its
dinmeter is called solenoid. When current is flowing through the solenoid, the
magnetic field is present inside the solenoid. These current carrying solenoids
are used in electronic circuit and to form an electromagnet. By inserting the
magnetic field sensor between the coils of a solenoid, one can measure the
magnetic field inside the solenoid and determine the relationship between the (1)
magnetic field and current, and (ii) magnetic field and number of turns per
metre in a solenoid. On performing the experiment with the help of suitable
apparatus, the following observations were noted.
Sr. Ve
Table A
Current in
solenoid ()
Magnetic
Field
(x10'T
2:51
1
05
10
3
3.72
1
2.0
SE
No.
Table B
Length of No. of turns
solenoid per metre
Magnetic
Fleid
(x10-1))
1
0
3.14
300
3
4
20
20.(0)
From the table, what relationship would you observe between the (i) magnetic
field and current, and (in) magnetic field and number of turns per metre of a
solenoid?
20 (1)
How can magnetic field strength of a solenoid be increased?
20.(IL) Draw the magnetic field pattern found inside the solenoid.
20. (IV) For same current flowing through a solenoid and a straight conductor, the
magnetic field produced by a solenoid is much stronger than the magnetic field
produced by a straight current carrying conductor. State one reason to justify
this statement.
20.(V)
What is an electromagnet?​

Answer 1

Answer:

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Explanation:

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