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प्रश्न
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उत्तर
Given power P = 3k W = 3000 W, Voltage = 250 V
We know that, P =VI
`"I" = "P"/"V" = 3000/250 = 12 "A"`
Thus am aximum of 12 A current can pass through the electric wire
and a fuse of rating 13 A should be used with it
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संबंधित प्रश्न
Draw the electrical symbols of the following components and state its use:
Rheostat (variable resistance)
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Find the effective resistance in the following circuit diagrams (Fig.):
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
Electrical power P is given by the expression P = (Q × V) ÷ time
(a) What do the symbols Q and V represent?
(b) Express the power P in terms of current and resistance explaining the meanings of symbols used there in.
Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?
