Question

A straight horizontal wire of mass 10 mg and length 1m carries a current 2A what minimum
magnetic field should be applied in the region so that the magnetic force on the wire may balance
its weight
2f1f2
f1 + f2
(C) ✓ fifa
(D) I = 5 sin (100t + 5) amp
10​

Answer 1

Answer:

I guess the options given are wrong

Explanation:

Mass = 10mg = 10^-5kg

Length = 1m

I = 2A

B = ?

Now, Mg = ilB

Mg/il=B

B=10^-5×9.8/2×1

B=4.9×10^-5