# Electrical Engineering - Inductors - Discussion

### Discussion :: Inductors - General Questions (Q.No.5)

5.

The voltage across a coil when di/dt = 20 mA/ s and L = 8 H is

 [A]. 16 mV [B]. 160 mV [C]. 1.6 mV [D]. 2.5 mV

Explanation:

No answer description available for this question.

 Deepika said: (Jun 29, 2011) Given inductance = 8*10^-6henry. { Henry symbol is H } and also di/dt means given change of current 20*10^-3amperes. Current is measured in amperes. Inductance is measured in henry. To find the voltage L *di/dt = 8*10^-6*20*10^-3/10^-6 = 160*10^-3 = 160mv voltage is measured in volts.

 Deepika said: (Jun 29, 2011) Given change of current di/dt = 20*10^-3amperes./10^-6 s Inductance = 8*10^-6henry. To find voltage = L*di/dt = 8*10^-6*20*10^-3/10^-6 = 160*10^-3 v. = 160 milli volts.

 Bala said: (Sep 11, 2011) Thanks deepika.

 Mahesh said: (Feb 17, 2015) V = LDI/DT. = 8*20. = 160.

 Pavan said: (Oct 14, 2015) Inductor stores energy in the form of electromagnetic field. Output Voltage can be varied when current through it will change with time t. So v = L*di/dt.

 Pramod said: (Feb 8, 2016) Given data, Rate of change of current = 20 mA/micro sec. Inductor = 8 microhenry. From the formula: Voltage across inductor (V) = L * Rate of change of current, So, V = 8*20 = 160 mv.

 Stuti said: (Feb 15, 2016) V = LDI/DT. = 8*10^-6*20*10^-3/10^-6. = 160*10^-3v.

 Dinesh said: (Aug 12, 2016) Helpful solution, Thank you all.

 Ravi said: (Feb 3, 2017) Thank you @Pramod.

 Krushnapada said: (Apr 22, 2017) We all know that the formula of the inductor for finding voltage. Is Ldi/it. So data given, L = 8*10^-6 H. di/DT=20*10^-3/10^-6. So according to formula. V = 8 * 10^-6 * 20 * 10^-3/10^-6. = 160*10^-3v.

 Priyanka said: (Jul 23, 2018) V = Ldi/dt, = 8 * 20. = 160V.

 Ram said: (Sep 11, 2018) v = Ldi/dt. = 8 * 20. = 160V.

 Engr.Talha said: (Sep 24, 2020) Why we are dividing it by 10^-6? Please explain about it.