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Ashok0210

Asked: February 21, 2021In: Class 12 Physics

(a) Three resistors 1 Ω, 2 Ω, and 3 Ω are combined in series. What is the total resistance of the combination? (b) If the combination is connected to a battery of emf 12 V and negligible internal resistance, obtain the potential drop across each resistor.

Class 12 Physics CBSE and UP Board Current Electricity NCERT Solutions for Class 12 Physics Chapter 3 Chapter-3 Exercise 3.3

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

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?

Class 12 Physics CBSE and UP Board Current Electricity NCERT Solutions for Class 12 Physics Chapter 3 Chapter-3 Exercise 3

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

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?

Class 12 Physics CBSE and UP Board Current Electricity NCERT Solutions for Class 12 Physics Chapter 3 Chapter-3 Exercise 3.1

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 × 10²⁸ m⁻³. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0 × 10⁻⁶ m² and it is carrying a current of 3.0 A.

Class 12 Physics CBSE and UP Board Current Electricity Exercise 3 Chapter-3 Exercise 3.13

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0 cm, what is the emf of the second cell?

Class 12 Physics CBSE and UP Board Current Electricity Exercise 3 Chapter-3 Exercise 3.12

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