+91-93193 64476
FlagBACK
Flag Electric Current> Two cells of EMF 2E and E and internal re...
question mark

Two cells of EMF 2E and E and internal resistance 2r and r respectively are connected in parallel. Obtain the expression for the equivalent EMF and the internal resistance of the combination??

Sumit Jha , 7 Years ago
Grade 12
anser 1 Answers
Susmita
Equivalent internal resistance is simply
req=r1r2/(r1+r2)=2r/3
For parallel connection total current
I=I1+I2
Or,Eeq/req=E1/r1+E2/r2
Or,Eeq=reqE1/r1+reqE2/r2=(r2E1+r1E2)/(r1+r2)=4E/3
 
ApprovedApproved
Last Activity: 7 Years ago
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Other Related Questions on electric current

question mark
The fig. Shows a network of resistance in which the point A is earthed
 
electric current
0 Answer Available

Last Activity: 3 Years ago

question mark
When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?
 
electric current
0 Answer Available

Last Activity: 3 Years ago

question mark
Please provide it's solution. In video form 
Find the equivalent resistance of the given figure
electric current
1 Answer Available

Last Activity: 4 Years ago

question mark
The resistivity of material is 10 ohm m at 30 C when the temperature drops to 28 then the resistivity  drops by 2. The temperature coefficient of resistivity of material is 
electric current
1 Answer Available

Last Activity: 4 Years ago

question mark
Three cells of 2.0v each and internal resistance of 1.0 each are connected in series and in parallel calculate the new emf and new internal resistance in each connection
 
electric current
1 Answer Available

Last Activity: 4 Years ago