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संबंधित प्रश्न
The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B. represents the parallel combination? Give reasons for your answer.
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is 27 × 10−8 Ωm.
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
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
What is a resistance? Define it with respect to Ohm’s law,
In the circuit shown below, calculate the equivalent resistance between the points (i) A and B, (ii) C and D.
What should be the length of a nickel wire of area of cross-section 3 mm2 used for making a rheostat of 750 ohm? (ρ of nickle = 0.069 Ohm mm2/m)
Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Find the equivalent resistance in each case.
