A long solenoid has 200 turns per cm and carriers a current i. The magnetic field at its centre is 6.28 10^-2 Wb/m^2. Another long solenoid has 100 turns per cm and it carries a current i/3. The valu…

Question

A long solenoid has 200 turns per cm and carriers a current i. The magnetic field at its centre is 6.28 10^-2 Wb/m^2. Another long solenoid has 100 turns per cm and it carries a current i/3. The value of magnetic field at its center is nearly

Accepted Answer

Correct answer: D. (d) Magnetic field due to a long solenoid is given by, B= _0 nI B=6.28 10^-2 wbm^2 ;n=200 10^-2 6.28 10^-2= _0 200 10^-2 I (i )Magnetic field when another solenoid has 100 turns per cm and current is I3, then, B= _0 100 10^-2 I3 (ii) From equation (i) and (ii), B=1.05 10^-2 Wb/m^2

$A long solenoid has 200 turns per cm and carriers a current i . The magnetic field at its centre is 6.28 \times 10^{- 2} Wb / m^{2} . Another long solenoid has 100 turns per cm and it carries a current i /3 . The value of magnetic field at its center is nearly$

Solution

More Moving Charges & Magnetism PYQs