Advertisements
Advertisements
प्रश्न
How does the heat produced by die passage of current in a metallic wire depend on the time of passage of current in the wire?
Advertisements
उत्तर
The heat produced is proportional to the time of passage of current in the wire.
संबंधित 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
The commercial unit of energy is :
(a) watt
(b) watt-hour
(c) kilowatt-hour
(d) kilo-joule
Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
In an electric radiator or room heater, state with reason, why the porcelain tube wound with a nichrome wire is placed between the pole and principal focus of the parabolic concave reflector.
State relative advantages and disadvantages of ring system of wiring over the tree system.
State the reason why, in a three pin plug, the earth pin is longer and thicker than the other two.
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.
