Question

A copper wire having a resistance of 0.01ohm
per metre is used to wind a 400 turn solenoid of radius
1.0 cm and length 20 cm. Find the emf of a battery which
when connected across the solenoid would produce a
magnetic field of 10 -2 T near the centre of the solenoid.​

Answer 1

Resistance of wire per metre <br>

<br> No. of turns in solenoid,

, <br> radius,

, <br> length of solenoid

, <br> e.m.f.,

<br> Length of wire used in solenoid <br>

<br>

<br> Total resistance of wire used in solenoid, <br>

resistance permetrexxl <br>

<br> Current in solenoid, <br>

<br> Magnetic field near the centre of solenoid <br>

<br>

Answer 2

hope it helps you Di!!!

please mark it as brainliest!!!