Class 12 Physics Practical

• 1. To find volume of a cylindrical by using Vernier Caliper.
• 2. To find diameter and area of cross sectional of wire by screw gauge.
• 3. To find the volume of spheres by screw gauge.
• 4. To find the unknown weight of body by the method of vector addition of Forces.
• 5. For simple pendulum verify that time period is independent of amplitude.
• 6. For simple pendulum verify that time period is independent of mass of Bob.
• 7. For simple pendulum verified time period is proportional to the square root of its length.
• 8. To find the focal length of convex lens by displacement method.
• 9. To find the refractive index of Glass by Critical Angle method.
• 10. To find the volume of cheap by free fall method using an electrical time tracker / timer.
• 11. To find the acceleration due to gravity by oscillating mass spring system.
• 12. To find the resistance and resistivity of wire of the given wire by slides wire Bridge.
• 13. To find the resistance of galvanometer by half deflection method.
• 14. To find the resistance of voltmeter by drawing graph between R and 1 / V.
• 15. To find the Emf of Cell By using Potentiometer.
• 16. To find the internal resistance of cell by using potentiometer.
• 17. To study the variation of current with intensity of light using photocell.

• Apparatus: Vernier calipers, solid cylinder
• Procedure: (i). First of all I measured the least count of the vernier calipers. (ii). I checked the zero error of the vernier calipers and zero correction which was nil. (iii). Then I placed the cylinder lengthwise between the lower jaws of vernier calipers and estimated its length from the main and Vernier scales. I took three observations for length. (iv). Then I placed the cylinder diameter wise between lower jaws and took three observations for diameter by applying the same procedure. (v). I found out the mean values of length and diameter and find the mean radius. (vi). Finally I calculated the volume of the cylinder by applying the formula V = πr^2L
• Observations and calculations:  Least count = Smallest division on t e main scale / Total number of division on t e Vernier scale

• Apparatus : Micrometer screw gauge, wire 
• Procedure:  (i). First of all I measured the least count of screw gauge. (ii). Then I checked the zero error of screw gauge and hence find the zero correction which was nil. (iii). Then I placed the wire between the studs of the screw gauge and turned the screw gently till the studs come in contact with wire. (iv). Then I measured the diameter of the wire by using main and circular scale as D = X+(n*L.C). (v). Then I measured the diameter at two more points of the wire and took mean value and mean radius. (vi). Finally I computed the area of the wire by using the formula A = πr^2
• Observations and calculations:  Least count = Smallest division on t e main scale / Total number of division on t e Circular scale

• Apparatus: Micrometer screw gauge, wire
•  Procedure: (i). First of all I measured the least count of screw gauge. (ii). Then I checked the zero error of screw gauge and hence find the zero correction which was nil. (iii). Then I placed the solid sphere between the studs of the screw gauge and turned the screw gently till the studs come in contact with the solid sphere. (iv). Then I measured the diameter of the solid sphere by using main and circular scale as D = X + ( n*L.C ). (v). Then I measured the diameter at two more points of the sphere and took mean value and mean radius. (vi). Finally I computed the volume of the sphere by using the formula V = 4 / 3 πr^3