EASY
12th ICSE
IMPORTANT
Earn 100

If the potential difference applied across a variable resistor is constant, draw a graph between the current in the resistor and the resistance of the resistor.

Important Questions on Electric Resistance and Ohm's Law

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 38
State the conditions under which Ohm’s law is not obeyed in a conductor.  
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 39
Explain the difference between ohmic and non-ohmic resistances. Give examples.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 40
What do you mean by a linear resistor?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 41
Is a light bulb an ohmic resistor, explain.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 42
Nichrome and copper wires of same length and same radius are connected first in series and then in parallel and same current is passed in them in both cases. Which wire will glow first in each case?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 43
Two 100 W-220 V bulbs, one having a carbon filament and the other having a metallic filament, are connected in series. Which one will glow more?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 44
Water boils in an electric-kettle in 15 minutes after being switched on. Using the same mains supply, should the length of the heating element be increased or decreased if the water is to boil in 10 minutes? How much?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 45
A heater joined ‘in series’ with a 60 W bulb is connected to the mains. If the 60 W bulb be replaced by a 100 W bulb, will the heat produced by the heater be more, less or remain the same?