Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
The potential difference between two points may be defined as the work done in moving a unit positive charge from one point to the other.
APPEARS IN
संबंधित प्रश्न
1 calorie = _________ joule.
An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate:
(a) the power of the kettle.
(b) the energy transferred in 1 minute.
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
List the names of three electrical gadgets used in your house. Write their power, voltage ratingand approximate time for which each one is used in a day. Hence find the electrical energyconsumed by each in a day.
A bulb with rating 250 V, 100 W is connected to a power supply of 220 V situated 10 m away using a copper wire of area of cross-section 5 mm2. How much power will be consumed by the connecting wires? Resistivity of copper = 1.7 × 10−8 Ωm
Two resistors A and B of 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate the power supplied by the battery.
What is electric power? State and define its S.I. unit.
‘The current rating of a fuse is 5A’. Comment on this statement.
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
