Question

An e.m.f. of 12 volt is produced in a coil when the current in it changes at the rate of 45 amp/minute. The inductance of the coil is

• A. 0.25 henry
• B. 1.5 henry
• C. 9.6 henry
• D. 16.0 henry

Answer 1

Answer: (D)

16.0 henry

Answer 2

$e = L \frac { d i } { d t } \Rightarrow 12 = L \times \frac { 45 } { 60 } \Rightarrow L = 16 H$