Discussion :: Inductors  General Questions (Q.No.5)
5.  The voltage across a coil when di/dt = 20 mA/s and L = 8 H is 

Answer: Option B 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. 
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