Test Index

NCERT Class XII Chapter
Current Electricity
Questions With Solutions

© examsnet.com
Question : 2
Total: 24
A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. if the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?
Solution:  

I =
E
R+r
 ⇒ 0.5 =
10
R+3
R + 3 = 20 ⇒ R = 17 Ω
Terminal voltage of the battery
V = E - Ir = 10 - 0.5 x 3 = 8.5 V
© examsnet.com
Go to Question:
Prev Question
Next Question