List of top Physics Questions on Resistance

Two resistors of 6$\Omega$ and 3$\Omega$ are connected in parallel. Equivalent resistance is: ____.
A wire of length $1\text{ m}$ is broken into two unequal parts $P$ and $Q$. Part $P$ is extended to double its length so that its resistance become equal to resistance of $Q$. The length of $Q$ part is:
Ten resistors, each having resistance of $6\text{ }\Omega$, are connected in a circuit. Then the ratio of maximum current to the minimum current that can flow through the circuit is:
What happens to the resistance of a wire if its radius is halved?
The effective resistance between \(A\) and \(B\) is _ _ _, where \(R=3\,\Omega\).
A resistor has three colour bands: Orange, Red and Black from left to right respectively. The value of resistance is
The temperature coefficient of resistance of a coil of wire of resistance \(4 \Omega\) at \(30^\circ\text{C}\) and \(6 \Omega\) at \(70^\circ\text{C}\) (in per \(^\circ\text{C}\)) is
If the length of a linear conductor is doubled and its area of cross section halved, its resistance is
The current-voltage graphs for a given conducting sample at two different temperatures \(T_1\) and \(T_2\) are shown in the figure below. \(R_1\) is the resistance of the sample at temperature \(T_1\) and \(R_2\) is the resistance at temperature \(T_2\). Choose the correct answer.
A wire of resistance R is stretched uniformly to double its original length. The new resistance will be:
A wire of resistance $R$ is stretched to double its original length. Its new resistance will be [H] [width=0.5\linewidth]{107.png}
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:
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 $[\alpha = 4 \times 10^{-3} \ ^\circ\text{c}^{-1}]$
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 \(R\).
Find the effective resistance of the network of resistors between points A and F as shown in the figure.
The ends of six wires, each of resistance R
The resistance of 2 km of a subway track with cross-sectional area 20 $cm^2$ is (in ohm) as a multiple of the specific resistance of steel $\rho$: ________.
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?