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प्रश्न
Give the law of combination of resistances in series.
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उत्तर
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संबंधित प्रश्न
Complete the following :-
(a)
Judge the equivalent resistance when the following are connected in parallel − (a) 1 Ω and 106Ω, (b) 1 Ω and 103Ω and 106Ω.
Write any two characteristics of a series combination of resistors.
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Name the material which is used for making the heating element of an electric iron.
Give one example to show how the resistance depends on the nature of material of the conductor.
A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
How does the resistivity of a semiconductor depend on temperature?
The voltage applied to a given rheostat is made four times its initial value. By what factor will be resistance of the rheostat change?
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.
What is the maximum resistance which can be made using five resistors each of `1/5` W?
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be:
