EASY
12th CBSE
IMPORTANT
Earn 100

The temperature coefficient of resistivity of copper is 0.004°C−1. Find the resistance of a 5 m long copper wire of diameter 0.2 mm at 100°C, if the resistivity of copper at 0°C is 1.7×10−8Ωm.

Important Questions on Current Electricity

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 1
Given the resistances of 1 Ω, 2 Ω and 3 Ω. How will you combine them to get an equivalent resistance of 113 Ω?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 1
Given the resistances of 1 Ω, 2 Ω and 3 Ω. How will you combine them to get an equivalent resistance of 115 Ω?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 2
Given three resistances of 30 Ω each. How can they be connected to give a total resistance of 90 Ω?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 2
Given three resistances of 30 Ω each. How can they be connected to give a total resistance of 10 Ω?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 2
Given three resistances of 30 Ω each. How can they be connected to give a total resistance of 45 Ω?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 3
A 5 Ω resistor is connected in series with a parallel combination of n resistors of 6 Ω each. The equivalent resistance is 7 Ω. Find n.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 4
A uniform wire of resistance 2.20 Ω has a length of 2 m. Find the length of the similar wire which connected in parallel with the 2 m long wire, will give a resistance of 2.0 Ω.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>Problems For Practice>Q 5
A wire of 15 Ω resistance is gradually stretched to double its original length. It is then cut into two equal parts. These parts are then connected in parallel across a 3.0 volt battery. Find the current drawn from the battery.