List of top Physics Questions on Resistance

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:

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:

A cell of emf $ E $ and internal resistance $ r $ is connected to an external variable resistance $ R $. Plot a graph showing the variation of terminal voltage $ V $ of the cell as a function of current $ I $, supplied by the cell. Explain how the emf of the cell and its internal resistance can be found from it.

A wire of resistance $ R $ is bent into a triangular pyramid as shown in the figure, with each segment having the same length. The resistance between points $ A $ and $ B $ is $ \frac{R}{n} $. The value of $ n $ is:

A wire of resistance $ X \, \Omega $ is gradually stretched till its length becomes twice its original length. If its new resistance becomes 40 $ \Omega $, find the value of $ X $.

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

A resistor of resistance $ 10\, \Omega $ is connected across a $ 20\, V $ battery. Calculate the current flowing through the resistor.

What is the resistance of a conductor if the potential difference across it is 12 V and the current flowing through it is 3 A?

In a given circuit, an ideal battery is connected with four resistances as shown. Find current $i$ as mentioned in the diagram.

A wire of resistance $ R $ and length $ L $ is cut into 5 equal parts. If these parts are joined in parallel, then the resultant resistance will be:

In the meter bridge shown below, the null point is at 40 cm from A. If R is shunted by 22, find the distance of new balance point from A

A square loop of resistance $16 \;Ω$ is connected with battery of $9$ $V$ and internal resistance of $1$ $Ω$. In steady state. Find energy stored in capacitor of capacity $C = 4 µF$ as shown. (at steady state current divides symmetrically)

The voltage applied across the resistance R is 200+5 and current in resistance is 20+0.2 then find % error in resistance.

An electric toaster has resistance of $ 60 \, \Omega $ at room temperature $ (27^\circ \text{C}) $. The toaster is connected to a 220 V supply. If the current flowing through it reaches 2.75 A, the temperature attained by the toaster is around: (if $ \alpha = 2 \times 10^{-4} / ^\circ \text{C} $)

If the percentage error in measuring length and diameter of a wire is $0.1\%$ each, then the percentage error of the resistance of the wire is :

Two resistances having coefficient of variation of resistivity $α_1$ and $α_2$ are having equal resistance. Equivalent temperature coefficient of resistivity in series and parallel combinations are:

Find the potential difference across $700$ $Ω$ resistance (i.e. Vo)

A galvanometer having coil resistance 10 Ω shows a full scale deflection for a current of 3 mA. For it to measure a current of 8 A, the value of the shunt should be:

Primary coil of a transformer is connected to 220 V ac. Primary and secondary turns of the transforms are 100 and 10 respectively. Secondary coil of transformer is connected to two series resistance shown in shown in figure. The output voltage (V0) is :

Two wires A and B are made up of the same material and have the same mass. Wire A has radius $2.0 \, \text{mm}$ and wire B has radius $4.0 \, \text{mm}$. The resistance of wire B is $2 \, \Omega$. The resistance of wire A is _____ $ \Omega $.

To determine the resistance $ R $ of a wire, a circuit is designed below. The V-I characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in the figure. The value of $ R $ is $ \dots \dots \dots \Omega $.

A 16Ω wire is bent to form a square loop. A 9 V battery with internal resistance 1Ω is connected across one of its sides. If a 4μF capacitor is connected across one of its diagonals, the energy stored by the capacitor will be $\frac{x}{2}$ μJ, where $x =$ _____.

Find equivalent resistance between A and B for a given circuit in ___ohms.