Advertisements
Advertisements
Question
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
Name the quantity whose unit is (i) kilowatt, and (ii) kilowatt-hour.
Define watt-hour. How many joules are equal to 1 watt-hour?
Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
Electrical power P is given by the expression P = (Q × V) ÷ time. What do the symbols Q and V represent?
Name the S.I unit of electrical energy. How is it related to Wh?
A simple electric circuit has 24 V battery and a resistor of 60 Ω. What will be the current in the circuit? The resistance of the connecting wires is negligible.
Which material is the calorimeter commonly made of? Give one reason for using this material.
An electric lamp A of 40 W and another electric lamp B of 100 W are connected to 220 V supply. Calculate the ratio of their filament resistances?
What is the meaning of electric power of an electrical device? Write its SI unit.
