Define the rule which explains
3. a) Calculate the monthly bill for a heater of resistance 301 used on 220 V mains
when it is used daily for one hour at the cost of 5 rupees per kilowatt hour
Answers
Answer:
Q1. What does an electric circuit mean?
Ans. A continuous conducting path consisting of wires and other resistances and a switch between the two terminals of a cell or a battery along which an electric current flow is called a circuit.
Q2. Define the unit of current.
Ans. The unit of current is Ampere. 1 Ampere is said to be when 1 coulomb of charge flow through any cross section of a conductor in 1 second.
Q3. Calculate the number of electrons constituting one coulomb of charge.
Ans. 1C = 6 × 1018 electrons.
Q4. Name a device that helps to maintain a potential difference across a conductor.
Ans. A battery of many cells or a single cell can maintain potential difference.
Q5. What is meant by saying that the potential difference between two points is 1 V?
Ans. The potential difference between two points is said to be 1 V if 1 Joule of work is done in moving 1 Coulomb of charge from one point to another point.