The magnetic flux linked with the coil (in Weber) is given by the equation-

Q. The magnetic flux linked with the coil (in Weber) is given by the equation-

Փ = 5t² + 3t + 16

The induced EMF in the coil at time, t=4 will be-
(i) -27 V
(ii) -43 V
(iii) -108 V
(iv) 210 V

Answer: (ii) -43 V

Փ = 5t² + 3t + 16

|e|=dՓ/dt

= d[5t² +3t+16]/dt

=10t+3

|e|_t=4 =10(4)+3= 43V

e= -43Volts