Advertisements
Advertisements
Question
‘The current rating of a fuse is 5A’. Comment on this statement.
Advertisements
Solution
This statement means that the current in the circuit should not Exceed 5A. As the current in circuit will Exceed 5A, the fuse will melt and the circuit will break.
RELATED QUESTIONS
At what frequency is AC supplied to residential houses?
Define watt. Write down an equation linking watts, volts and amperes.
The commercial unit of energy is :
(a) watt
(b) watt-hour
(c) kilowatt-hour
(d) kilo-joule
Electrical power P is given by the expression P = (Q × V) ÷ time. What do the symbols Q and V represent?
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long will it take if the supply voltage falls to 200 V?
An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?
What is the resistance of an appliance rated at V volt, P watt?
A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the total energy supplied by the battery in 10 minutes.
