The unit of resistance in the SI system is the Ohm (Ω).

The unit of resistance is Ohm, which is defined as the resistance between two points when a constant potential difference of one volt produces a current of one ampere.

The unit of resistivity is Ohm-meter (Ω·m).

Using Ohm's law, V = I * R = 0.5 A * 10 Ω = 5 V.

Using Ohm's law, V = I * R = 2 A * 3 ohms = 6 V.

Using Ohm's law, V = I * R = 2 A * 5 ohms = 10 V.

Using Ohm's law, V = I * R = 3 A * 5Ω = 15 V.

Using Ohm's law, V = I * R = 3A * 5Ω = 15V.

A potentiometer is typically used in a closed circuit to measure voltage without drawing current.

A potentiometer setup typically uses a series circuit to ensure a constant current flows through the wire.

Using the formula Vx/Vk = Lx/Lk, we have Vx = Vk * (Lx/Lk). Here, Lx = 4 m, Lk = 10 m, Vk = 12 V, thus Vx = 12 V * (4/10) = 4.8 V.

The condition for balance in a potentiometer is that the potential difference across the galvanometer must be zero, indicating that the unknown voltage is equal to the voltage across the potentiometer wire.

The circuit must be open when measuring the emf of a cell with a potentiometer to ensure that no current flows through the cell, allowing for an accurate measurement.

At balance, the potential difference across the cell equals the potential drop across the potentiometer wire.

Keeping the circuit closed ensures that the current flows properly, allowing for accurate voltage measurements.

Rubber has a much higher resistivity compared to metals like copper, aluminum, and iron.

Silver has the lowest resistivity among common materials.

A Wheatstone bridge can be formed using a combination of series and parallel resistors.

The color of the wire does not affect the accuracy of a potentiometer; however, temperature, length, and material do.

Resistivity is a property of the material and does not depend on the length or cross-sectional area.

An inductor is not a component of a Wheatstone bridge; it consists of resistors, a galvanometer, and a battery.

While the other conditions are necessary for balance, the resistances do not need to be equal, just in the same ratio.

A Wheatstone bridge is not used for generating high voltages; it is used for measuring resistances.

Determining the specific heat of a substance is not a practical application of the Wheatstone bridge.

A potentiometer is not used for direct resistance measurement; it is primarily used for voltage measurements.

Rubber is an insulator and has a much higher resistivity compared to metals like copper, aluminum, and silver.

Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.

Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.

Copper is a good conductor of electricity, while rubber, glass, and wood are insulators.

A potentiometer requires a constant current to ensure accurate measurements of voltage.