Ohm's Law states that voltage is equal to the product of current and resistance (V = IR).

A rheostat is a type of variable resistor used to control the flow of current in a circuit.

In a series circuit, the current flowing through every component is the same.

Resistance is the measure of the opposition to current flow in an electrical circuit.

A voltmeter is connected in parallel to measure the potential difference (voltage) across a component.

For parallel resistors, 1/Rt = 1/R1 + 1/R2 + 1/R3. 1/Rt = 1/10 + 1/10 + 1/10 = 3/10. Rt = 3.33 ohms.

Power is defined as the product of voltage and current (P = VI).

Copper is widely used in electrical wiring due to its high conductivity and relatively low cost.

Since I = V/R, if R is doubled, the current I becomes half of its original value.

A cell or battery is a source of electromotive force that converts chemical energy into electrical energy.

Rubber has high electrical resistivity, which prevents the flow of electrons, making it an effective insulator.

In a parallel circuit, the voltage across each parallel branch is identical to the source voltage.

A galvanometer is a sensitive instrument designed to detect and measure small currents.

In a series circuit, the total resistance is the sum of individual resistances (R = R1 + R2...), so adding more resistors increases the total resistance.

Electric power is defined as the rate of doing work or the rate at which electrical energy is dissipated or converted.

Kirchhoff's Current Law (KCL) is based on the principle of conservation of charge.

An open circuit means there is a break in the path, preventing the flow of electrons, hence no current flows.

The SI unit of power is the Watt, defined as one joule per second.

Resistance depends on the material, length, temperature, and cross-sectional area, but the color of the insulation is purely aesthetic or identification-based.