EASY
12th ICSE
IMPORTANT
Earn 100

Find out the change in the resistance of an eureka wire when its radius is halved and the length is reduced to one-fourth of its original length.

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 26
The ratio of the diameters of two copper wires of the same length is 1 : 2. What is the ratio of their resistances?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 27
There are two wires of the same metal of same area of cross-section but having lengths in the ratio 2:1. If same PD is applied across their ends, what will be the ratio of currents in them?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 28
There are two wires of same metal, iI the lengths be same but the ratio of cross-sectional areas be 2 : 1, thenWgat are the ratioo of their currents?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 29
What would be the resistance of a resistor colour coded brown-red-orange?  
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 30

What is the resistance of a carbon resistor whose coloured bands are shown in the figure below?

     Question Image

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 31
What is the colour code of a carbon resistor having a resistance of 470 Ω and a tolerance of 5%?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 32
In an electric circuit, energy is transferred at a rate of 1 joule per second. What is the power in the circuit?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 33
What is kilowatt-hour (kW-h)? What is it commonly known as?