Advertisements
Advertisements
प्रश्न
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Advertisements
उत्तर
In an electrical circuit, electrical power
P = V2/R
where V = potential difference and R = resistance.
APPEARS IN
संबंधित प्रश्न
Complete the following :-
(a)
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
How does the resistance of a wire change when:
its length is tripled?
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of 0.2 `Omega`
When do you say that the resistors are connected in this way? Draw a circuit diagram.
State expression for Resistance connected in series.
State expression for Cells connected in parallel.
Three resistors of 6Ω, 3Ω and 2Ω are connected together so that their total resistance is greater than 6Ω but less than 8Ω Draw a diagram to show this arrangement and calculate its total resistance.
Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Find the equivalent resistance in each case.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
