Advertisements
Advertisements
Question
A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is ______.
Options
1.8 W
2.4 W
3.6 W
7.2 W
Solution
A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is 3.6 W.
Explanation:
Given: V = 6V, R = 10 Ω
Power, P = `V^2/R`
P = `(6)^2/10`
P = 3.6 watt
APPEARS IN
RELATED QUESTIONS
Define Electric power
How many joules of electrical energy are transferred per second by a 6 V; 0.5 A lamp?
(a) 30 J/s
(b) 12 J/s
(c) 0.83 J/s
(d) 3 J/s
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?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
An electric iron is rated at 230 V, 750 W. What is its resistance? What maximum current can be passed through it?
Unit of electric power may also be expressed as:
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.
An overhead tank of capacity 10 k litre is kept at the top of building 15 m high. Water falls in tank with speed 5`sqrt2` m/s. Water level is at a depth 5 m below ground. The tank is to be filled in `1/2` hr. If efficiency of pump is 67.5% electric power used is ______ W.
