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 What is the commercial unit of KWh? Electrical energy The work done by a source of electricity to maintain a current in an electrical circuit is called as electrical energy. q=It W=Vq W=VIt E=VIt Electric … [Read more...] about Electrical energy and power
Electricity
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 for the equivalent resistance R when there resistors are connected in series? Question 3 A resistance of 6 Ω is connected in series with another resistor of 4 Ω.A potential difference of 20 volts is applied across the … [Read more...] about Resistance are connected in series
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 components in an electric circuit with the help of their symbols is called circuit diagram. … [Read more...] about Circuit Diagram
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 and water heater work on heating effect of current? Question 4 Why does filament of an electric bulb is made up of tungsten? Question 5 Why electric fuse in the electric circuit melts when large current flows … [Read more...] about Heating Effect of electric current
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 for the equivalent resistance R when there resistors are connected in parallel? Question 3 Why parallel arrangement of resistors is used in domestic electric circuit? Question 4 A wire of resistance 5 Ω is bent in the … [Read more...] about Resistors are connected in parallel