Electro Magnetic Induction And Alternating Currents Question 326
Question: A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01 m2 in such a way that the plane of the necklace is normal to the field and is having a resistance R = 0.01 W. Because of power failure, the field decays to 1 T in time 10?3 seconds. Then what is the total heat produced in her necklace ? (T = Tesla) [Orissa JEE 2002]
Options:
A) 10 J
B) 20 J
C) 30 J
D) 40 J
Show Answer
Answer:
Correct Answer: A
Solution:
So,
