Category: Electricity

Electrical energy and power

Question 1 Define the term electrical energy? Question 2 Define the term electric  power? Question 3 What is the SI unit of power? Question 4...

Resistance are connected in series

Question 1 What is meant by series combination of resistors? Question 2 You are provided with three resistors R1 , R2  and R3 . Write the formula...

Circuit Diagram

Question 1 What is a circuit diagram? Question 2 Write the symbol for voltmeter and ammeter? Circuit Diagram A diagram showing the arrangement of various...

Heating Effect of electric current

Question 1 How heat is produced  when electric current is passed through a conductor? Question 2 Define Joule’s law? Question 3 How does electric heater,iron...

Resistors are connected in parallel

Question 1 What is meant by parallel combination of resistors? Question 2 You are provided with three resistors R1 , R2  and R3 . Write the formula...

Resistance

Question 1 A piece of wire is redrawn  by pulling it until its length is doubles.Compare the new resistance with the original value? Question 2...

Ohm’s Law

Question 1 State ohm’s law? Question 2 What is the resistance of an electric arc lamp,if the lamp uses 20 A when connected to a...

Electricity

Question 1 Define the term electric current? Question 2 What is the SI unit of electric current? Question 3 Define the term ampere? Question 4...