1800-150-456-789
FlagBACK
Flag Electric Current> If diameter of wire is tripled what will ...
question mark

If diameter of wire is tripled what will be its new resistance?
by changing diameter we actually chnage its area, so by changing area is there any change in lenght? (because volume should remain constant) or it will remain same in above mentioned case?

shy , 7 Years ago
Grade 12th pass
anser 1 Answers
Khimraj

Last Activity: 7 Years ago

As the resistance of a wire is inversely proportional to the square of the diameter of a conducting wire if its diameter is tripled its resistance becomes 9th part of the previous resistance.
 
IF in question it is given that diameter is changed by compressing or stressing wire then only length of wire changes.

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: 2 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
0 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
0 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
0 Answer Available

Last Activity: 3 Years ago