List of top Physics Questions on Resistance

The voltage-current graph for a metal wire of uniform area of cross section at two different temperatures $T$ and $T'$ is shown. Then choose the correct statement:
Two resistors of 6$\Omega$ and 3$\Omega$ are connected in parallel. Equivalent resistance is: ____.
Calculate the equivalent resistance between two diametrically opposite points of a circular wire of total resistance \(12\,\Omega\).
A wire of resistance \(R\) is stretched to double its original length. What is its new resistance?
A uniform metallic wire of radius $r$ and length $l$ is heated by passing a current through it. The heat produced can be made 8 times if
Find the equivalent resistance of three resistors of \(6\,\Omega\) each connected in parallel.
If resistance of a conductor at $20^\circ$C is $10\Omega$, then the resistance at $80^\circ$C is $[\alpha = 4 \times 10^{-3} \ ^\circ\text{c}^{-1}]$
What happens to the resistance of a wire if its radius is halved?
A wire of resistance \(R\) is stretched to triple its original length. Find the new resistance.
A wire of length \(L\) and resistance \(R\) is stretched to twice its length; what is the new resistance?
Find the equivalent resistance between two opposite corners of a cube made of wires, each having resistance \(R\).
What is the SI unit of resistivity?
The resistivity of a metallic wire is directly proportional to (T – temperature; \( \tau \) average time of collisions of free electrons; \( n \) – number of free electrons per unit volume; \( A \) – area of cross-section)
What is the SI unit of resistivity?
If an equilateral triangle is made of a uniform wire of resistance \( R \), then the equivalent resistance between the ends of a side is
The resistance of a wire of length \(l\) and cross sectional area \(A\) is \(R\). The resistance of another wire of the same material of length \(3l\) and cross sectional area \(\frac{A}{3}\) is
The resistance of a heating element is found to be \(120\Omega\) at room temperature which is \(20^\circ C\). If the temperature coefficient of the material of the resistor is \(1.6 \times 10^{-4}\,^\circ C^{-1}\) and the resistance is found to be \(160\Omega\), the temperature of the element is:
The net resistance between the points A and B in the circuit given below is:

The power dissipated across the \(16\Omega\) resistor in the circuit is \(2\) watts. The power dissipated in watt units across the \(4\Omega\) resistor is:

The resistance of the conductor is \( \sqrt{3}\Omega \) the angle made by the V-I graph with the voltage axis is \( \theta \)
What is the SI unit of resistivity?
A coil of resistance 10 \( \Omega \) is connected to a battery of 12 V. If the current flowing through the coil is 2 A, what is the power dissipated in the coil?
The effective resistance between points A and B in the given circuit is:
effective resistance between points A and B
A current of 2 A flows through a conductor with a resistance of 5 \(\Omega\). Calculate the potential difference across the conductor.
A wire of resistance \( R \), connected to an ideal battery, consumes a power \( P \). If the wire is gradually stretched to double its initial length, and connected across the same battery, the power consumed will be: