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प्रश्न
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उत्तर
A/c to Ohm's law,
R = `"V"/"I" = 20/2` = 10 Ω
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संबंधित प्रश्न
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
In series combination of resistances ______.
What do you mean by power rating of an electrical appliance? How do you use it to calculate
(a) the resistance of the appliance and
(b) the safe limit of the current in it, while in use?
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
Why are thick copper wires used as connecting wires?
State the effect of rise in temperature on the resistance of semi-conductors.
State expression for Cells connected in parallel.
What is a resistance? Define it with respect to Ohm’s law,
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is:
