+91-705-589-3577
FlagBACK
Flag Electric Current> A battery of e.m.f 3.0V is connected acro...
question mark

A battery of e.m.f 3.0V is connected across a potentiometer wire AB of 10m.If the jockey J makes contact at the 30cm mark, determine the resistance of length AJ and voltage across AJ

Chiemerie , 5 Years ago
Grade 10
anser 1 Answers
Harshit Singh
Dear student

E = 3.0V;
R / l =10Ω per m
l = 30cm = 0.3m;
R =10Ω per m × 0.3m = 3Ω
Thus , Resistance of AJ = 3 ohms
E / V = l1/ l2
⟹3 / V = 1 / 0.3


=3×0.3
Hence , Voltage across AJ = 0.9V



Thanks
ApprovedApproved
Last Activity: 5 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