EASY
12th ICSE
IMPORTANT
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A PD V exists across a conductor of length l and diameter d. How are the electric field E and the resistance R of the conductor affected when d is doubled?

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 23
A PD V exists across a copper wire of length l and diameter d. How will the drift velocity affected if V is doubled?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 23
A PD V exists across a copper wire of length l and diameter d. How will the drift velocity affected if l is doubled?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 23
A PD V exists across a copper wire of length l and diameter d. How will the drift velocity affected if d is doubled?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 24
A conductor of length l is connected to a DC source of potential V. The conductor is stretched to a length 3l keeping V constant. How do resistance of the conductor?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 24
A conductor of length l is connected to a DC source of potential V. The conductor is stretched to a length 3l keeping V constant. How do resistivity of the material of the conductor?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 24
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?
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?