Circuit Diagram A circuit diagram is a schematics diagram of an electric circuit in which different components of the circuit are represented by conventionally used symbols.

Ohm’s Law Let us find out if there is any relationship between the potential difference across a conductor And the current through it. Example 1. Case-Based: Set up a circuit as shown in Fig. below, consisting of a nichrome wire XY of length, say 0.5 m,…

Factors On Which Resistance of A Conductor Depends Consider a wire of length L, area of cross-section A and having a resistance R. Then the resistance of the wire directly proportional to the length of the wire and inversely proportional to the area of …

Resistance of A System of Resistors There are two methods of joining the resistors together. The figure below shows an electric circuit in which three resistors having resistances R1, R2, and R3, respectively, are joined end to end. Here the resistors a…

Electric Energy Work must be done continuously to maintain current in a conductor as the conductors offer resistance to the flow of current. The amount of work done W in carrying a charge Q through a wire of resistance R in time t is given by W = QV. Si…

Electric Power Electric power is defined as the rate at which electrical work is done or the rate at which electrical energy is consumed or dissipated. The power P is given by P= W/t = I2R Watt Watt is the unit of power and is defined as the power consu…

Magnetic Field and Field Lines Danish physicist, H. C. Oersted observed during the course of a Lecture that there is a connection between current and magnetism. We will study magnetic fields and also about electromagnets and electric motors which involv…

Magnetic Field Due To A Current Carrying Straight Conductor A current carrying conductor has a magnetic field associated with it, which was first demonstrated by H. C. Oersted. Let us understand what determines the pattern of the magnetic field generate…

Magnetic Field Due to A Current Carrying Circular Wire The magnetic field due to a current-carrying circular wire is shown in the figure below. Every section of the wire contributes to the magnetic field lines in the same direction within the loop. The…

Force on A Current Carrying Conductor In A Magnetic Field French scientist Andre Marie Ampere (1775-1836) suggested that the magnet must also exert an equal and opposite force on the current-carrying conductor. The force due to a magnetic field acting o…