Advertisements
Advertisements
Question
State expression for Cells connected in series.
Advertisements
Solution
I = `"nE"/("R" + "nr'")` cells in series.
RELATED QUESTIONS
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason?
The work done in moving a unit charge across two points in an electric circuit is a measure of:
(a) current
(b) potential difference
(c) resistance
(d) power
Give three reasons why different electrical appliances in a domestic circuit are connected in parallel.
In which of the following cases more electrical energy is consumed per hour?
(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms.
A 3 pin mains plug is fitted to the lead for a 1 kW electric kettle to be used on a 250 V A.C. supply. Which of the following statements is NOT correct?
(a) A 13 A fuse is the most appropriate value to use.
(b) The brown wire should be connected to the live side of the mains.
Electrical power P is given by the expression P = (Q × V) ÷ time
(a) What do the symbols Q and V represent?
(b) Express the power P in terms of current and resistance explaining the meanings of symbols used there in.
How should the electric lamps in a building be connected?
______ is used to measure the electric current.
What are the effects of electric current?
