Advertisements
Advertisements
प्रश्न
Which of the following is likely to be the correct wattage for an electric iron used in our homes?
(a) 60 W
(b) 250 W
(c) 850 W
(d) 2000 W
उत्तर
(c) 850 W
An electric iron may use a power of 850 watts.
APPEARS IN
संबंधित प्रश्न
What determines the rate at which energy is delivered by a current?
An electric heater of resistance 8 Ω takes a current of 15 A from the mains supply line. Calculate the rate at which heat is developed in the heater.
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
What does the unit kilowatt hour measure? Define it.
Why is the heating element of an electric oven wound on a helix? State the reason.
What is the order of current drawn by appliances connected to the ‘power circuit’ of a household?
How can electric energy consumed by an electric appliance be calculated in kilowatt hour (kWh)?
Two bulbs are rated: bulb A 100W, 120 V bulb B 10 W, 120 V. If both are connected across a 120V supply, which bulb will consume more energy, When in parallel? Also calculate the current through each bulb in the above cases.
A student wants to use an electric heater, an electric bulb and an electric fan simultaneously.
How should these gadgets be connected with the mains? Justify your answer giving three reasons.
