I-V characteristic curve for a p-n junction Aim To draw the I-V characteristic curve for a p-n junction diode in forward and reverse bias. Apparatus and Material Required Principle Procedure Caution Never increase the value of the voltage too much across the diode. Excessive current flow may damage the diode if it exceeds its limit. Maximum…
Refractive index of a liquid Aim To find the refractive index of a liquid using convex lens and plane mirror. Apparatus and Material Required Principle A real and inverted image coincides with the object placed on the principal focus point of a convex lens when a plane mirror placed horizontally below the lens. The rays from…
Determination of the Angle of Minimum Deviation for a given Prism Aim To determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation. Apparatus and Material Required Principle A triangular prism consists of three rectangular lateral surfaces and two triangular bases. The two lateral surfaces,…
Lateral Deviation of a Light Beam Aim To observe refraction and lateral deviation of a beam of light incident obliquely on a glass slab. Apparatus and Material Required Principle A ray of light incident on a rectangular glass slab bends at the interface of two optical media, here, air and the glass. The emerging ray out…
To find the focal length of a Concave Mirror – Experiment. Aim To find the value of v for different values of u in case of a concave mirror and to find the focal length. Apparatus and Material Required Terms and Definitions Cartesian Sign Convention Principle If an object is at a distance \(u\) from the…
Aim To determine the resistance of a galvanometer by half-deflection method and to find its figure of merit Apparatus and Material Required Principle Moving Coil Galvanometer is a sensitive electrical device used to detect current. It works on the principle that “a current carrying coil placed in a uniform magnetic field experiences a torque”. When a…
Aim To study the variation in potential drop with length of a wire for a steady current. Apparatus and Material Required Principle If a steady current is flowing through a wire with uniform cross section and constant resistance per unit length, potential drop \(V\) across two points of the wire is directly proportional to the length…
Assemble the Electrical Components – Activity to be done by Class 12 Physics Students Aim To assemble the components of a given electrical circuit. Apparatus and Material Required Resistor, ammeter, (0-1.5A) voltmeter (0-5V ), battery, one way key, rheostat, sand paper, connecting wires. Procedure Results The components of the electrical circuit were assembled. Precautions Discussion Draw…
Aim To assemble a household circuit comprising three bulbs, three (on/off) switches, a fuse and a power source. Apparatus and Material Required Three bulbs (12 W, 220 V each), three (on/off) switches, socket, a fuse of 1.0 A, plug, flexible connecting wire, main switch. Principle If \(P_1\), \(P_2\), \(P_3\), \(P_4\), \(P_5\), … \(P_n\) be the power…
Aim To verify the laws of combination of resistances (series and parallel) using a metre bridge. Apparatus and Material Required Principle When two resistances \(R_1\) and \(R_2\) are connected in series, the resistance of the combination \(R_S\) is given by \[R_S = R_1 + R_2\] When these two resistances are connected in parallel, the resistance of…