EASY
JEE Advanced
IMPORTANT
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The resistance of a wire is 10 Ω. Its length is increased by 10% by stretching. The new resistance will now be

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Important Questions on Current Electricity

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 10
The reciprocal of resistance is:
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 11
Conductivity increases in the order of
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 12
The charge of an electron is 1.6×10-19 C. How many electrons strike the screen of a cathode ray tube each second, when the beam current is 16 mA?
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 13
Calculate the amount of charge flowing in two minutes in a wire of resistance 10 Ω, when a potential difference of 20 V is applied between its ends.
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 14
A strip of copper and another of germanium are cooled from room temperature to 80 K. The resistance of
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 15
The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter, the change in the resistance of the wire will be:
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 16
The following five wires are made of the same material and are at the same temperature. Which one of them has the highest electrical resistance?
MEDIUM
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 2 - Current Electricity>Objective Problems [ Level 1 ]>Q 17
The electric field E, current density J and conductivity σ of a conductor are related as