+91-735-322-1155
FlagBACK
Flag Electric Current> resistance...
question mark

if a wire of length L is stretched from a fraction inorder to make its resistance four times the original
such that its new length is 3/2 times the original length...

then find the fraction by which it is increased....

amit sharma , 13 Years ago
Grade 12
anser 1 Answers
mani kanta

Formula:

(R1/R2)*(l2/l1)=(A1/A2)

 

A1/A2=3/8

Last Activity: 13 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: 3 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: 3 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: 3 Years ago