EASY
12th ICSE
IMPORTANT
Earn 100

A conductor of length ll is connected to a DC source of potential V. The conductor is stretched to a length 3l keeping V constant. How do the drift speed of free electrons in conductor change?

Important Questions on Electric Resistance and Ohm's Law

MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 25
A wire of resistance R is stretched until its radius is halved. What is its new resistance?
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 26
Two wires, one of copper and the other of manganin have equal lengths and equal resistances. Which wire is thicker?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 27
When the ends of a wire are connected to a battery, initially the current is slightly larger, but soon it decreases and becomes steady at a lower value. Why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 28
A current-carrying wire is heated. What happens to the drift velocity of free-electrons in the wire?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 29
The sequence of bands marked on carbon resistors are as follows. Find, in each case, the value of the resistance with tolerance.
 Brown, Black, Brown, Gold.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 29
The sequence of bands marked on carbon resistors are as follows. Find, in each case, the value of the resistance with tolerance.
 Yellow, Violet, Brown, Gold.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 29
The sequence of bands marked on carbon resistors are as follows. Find, in each case, the value of the resistance with tolerance.
Red, Red, Red, Silver.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 29
The sequence of bands marked on carbon resistors are as follows. Find, in each case, the value of the resistance with tolerance.
Yellow, Red, Orange, Silver.