Grade 12Electric Current
If the length of the conductor becomes double calculate the value of the new resistance.
2 Answers
Athul Joseph
R-reaistance,ฯ-resistivityVolume=const.A*L=A`*L/2A`=2AInitial resistance,R=ฯL/AFinal resistance,R`=ฯL/4AR`=R/4.Hope u understood.
Khimraj
Rsistance of a wire is directly proportional to the legth of wire.
If length is doubled by adding same wire then new reistance will be doubled.
and if length is doubled by streching then resistance will be four times of initial.
Other Related Questions on electric current
The fig. Shows a network of resistance in which the point A is earthed
The fig. Shows a network of resistance in which the point A is earthed
electric current
Last Activity: 4 Years ago
When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?
When a p.d of 2v is applied across a resistor, 10j of energy are covered. What charge flows through the resistor?
electric current
Last Activity: 4 Years ago
Please provide it's solution. In video form Find the equivalent resistance of the given figure
Please provide it's solution. In video form
Find the equivalent resistance of the given figure
electric current
Last Activity: 4 Years ago
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
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
Last Activity: 4 Years ago
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
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
Last Activity: 4 Years ago