Self Assessment-Class 10 -Science- Physics-Chapter 12:Electricity

Class 10 -Science-Self Assessment- Physics-Chapter 12:Electricity

Self Assessment 

Very Short Answer – 2 marks

Q1.What do you mean by elementary charge? 

Q2  State Ohm’s law.  

Q3  Define one ohm. 

Q4  Write the formula for resistance of a wire of length l and cross-section A.  

Q5  Define specific resistance

Short Answer – 3 marks

Q1. On what factors does the resistance of a conductor depend?

Q2. Define resistivity. Write the formula for resistivity. 

Q3 What is the formula for the combination of resistances when they are combined in :   (i) series and     (ii) parallel ?  

Q4 Why is the series arrangement not used for domestic circuits?  

Q5 How does the resistance of a wire vary with its cross-sectional area ?

Long Answer – 5 Marks

Q1. Define charge. What do you understand  by positive and negative charge ? Write down the expression for force between two charges. 

Q2. State Ohm’s law. How it can be  verified experimentally? 

Q3. Describe the conditions for constituting an electric current. Explain the mechanism of flow of electrons in a conductor.    

Q4. Derive the expression for the equivalent resistance when two resistors are joined in series. 

Q5. Derive the expression for the equivalent resistance when two resistors are joined in parallel.