EASY
12th ICSE
IMPORTANT
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Ohm’s law is obeyed by many substances, but it is not a fundamental law of nature. It fails :

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Important Questions on Electric Resistance and Ohm's Law

EASY
12th ICSE
IMPORTANT
In series combination of resistors :
EASY
12th ICSE
IMPORTANT
In parallel combination of resistors :
EASY
12th ICSE
IMPORTANT
Two resistances R1 and R2(>R1)) connected in parallel have an equivalent resistance R . Then:
MEDIUM
12th ICSE
IMPORTANT
A wire of resistance R is cut into n equal parts these parts are then connected in parallel with each other. The equivalent resistance of the combination is:
EASY
12th ICSE
IMPORTANT
If R1 and R2  are filament resistances of a 200 W  and a 100 W bulb respectively, designed to operate on the same voltage, then :
EASY
12th ICSE
IMPORTANT

The equivalent resistance between points a and f of the network shown in figure is

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EASY
12th ICSE
IMPORTANT
Write the relation between coulomb and ampere.
EASY
12th ICSE
IMPORTANT
What is the order of the number of free electrons in metals?