Grade 12Electric Current
What is answer for this question cjtfyjfyjfhfyjffykfyjfjhghjgjhghj
What is answer for this question cjtfyjfyjfhfyjffykfyjfjhghjgjhghj
1 Answer
Venkat
The potentiometer measures the exact value of emf
(as no current flows through the battery while measuring the emf)
1.4=i(280)1.4=i(280)
⇒i=0.005A⇒i=0.005A
V=E–irV=E–ir
Hence r=30ohmsr=30ohms
Two options are correct – emf of battery is 1.55 V and the internal resistance of the battery is 30 ohms.
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