Advertisements
Advertisements
प्रश्न
Two resistors of 4 Ω and 6 Ω are connected in parallel. The combination is
connected across a 6 volt battery of negligible resistance. Calculate:
( i) The power supplied by the battery,
(ii) The power dissipated in each resistor.
Advertisements
उत्तर
Total resistance of resitors of 4 Ω and 6 Ω in parallel is:
RP = `[1/4 + 1/6]^-1 = 2.4 Omega`
Given voltage supply= 6 volt
(i) Power supplied by the battery, P = `"V"^2/"R" = (6 xx 6)/2.4` = 15 watt
(ii) Power dissipated in 4 Ω resistor, P1 = `"V"^2/"R" = (6 xx 6)/4` = 9 watt
Power dissipated in 6 Ω resistor, P1 `"V"^2/"R" = (6 xx 6)/6` = 6 watt
APPEARS IN
संबंधित प्रश्न
The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity?
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
An electrician has wired a house in such a way that if a lamp gets fused in one room of the house, all the lamps in other rooms of the house stop working. What is the defect in the wiring?
Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω
Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.
Tell the odd one out. Give a proper explanation.
In the circuit shown in fig. 6, find the reading of the ammeter A when the switch S is
(a) Opened.
(b) Closed.
An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply?
