CBSE Class 10 Physics Electricity
Current and Voltage
Electric current is the rate of flow of charge.
Battery provides the driving force required to move the charges along the wire from one terminal to another.
The constant voltage difference between the two terminals of the wire maintains the constant electric current through the wire.
Electric current is measured in terms of amperes and voltage in volts.Ohm's Law
Resistance is the opposition offered to the flow of current through a conductor.
Resistivity is defined as the resistance offered by a cube of the material of side 1 m when the current flows perpendicular to the opposite faces of the cube.Resistors in Series and Parallel
A number of resistors are said to be connected in series if these are joined end to end.
A number of resistors are said to be connected in parallel if one end of each resistor is connected to one point and the other end is connected to another point.Heating Effect of Electric Current
The effect of heating current due to which heat is produced in a wire when current is passed through it is called heating effect of current.
Electric power is the rate at which electrical energy is produced or consumed in an electric circuit.