Advertisements
Advertisements
प्रश्न
Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Find the equivalent resistance in each case.
उत्तर
Given: R1 = 2 Ω, R2 = 3 Ω
(i) In series : Equivalent resistance R = R1 + R2
or R = 2 + 3 = 5 Ω
(ii) In parallel : Equivalent resistance R = `("R"_1"R"_2)/("R"_1 + "R"_2)`
or R = `(2 xx 3)/(2 + 3) = 6/5 = 1.2 Omega`
APPEARS IN
संबंधित प्रश्न
Name the material which is the best conductor of electricity.
How does the presence of impurities in a metal affect its resistance?
A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:
(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor
In series combination of resistances ______.
What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
State a relation between electrical power, resistance and potential difference in an electrical circuit.
State and explain the laws of resistance.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of 4 Ω.