Get, detailed solutions to the questions of the chapter **Current Electricity** from NCERT textbooks. The objective is to helping students regarding the pattern of answering the question as per the cbse latest marking scheme.**Cbse.jagranjosh.com** provided you NCERT solutions for classes 12th math and science subjects .

**Some questions of this chapter are given here**

**Q.** The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery?

**Sol.**

Given:

E = 12 V

r = 0.4 ohm

R = 0 ohm

From Ohm’s law

V = IR

I = E / (R + r)

Or I = 12 / 0.4 = 30 A

**Q. ** 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

**Sol.**

Given:

E = 10 V

r = 3 ohms

I = 0.5 A

Unknown resistor = R ohm