Ohm's law Experiment presentation with Audio and Video for std 12 Physics

Ohm's Law
AIM :-A voltmeter, a current meter, and an unknown resistance etc. are given to you. Prepare an appropriate circuit to verify Ohm’s law. With appropriate values of current and voltages, only with the help of calculations, determine the value of unknown resistance.
PRINCIPLE : Potential difference in a conductor produces electric current.
APPARATUS :-
A unknown resistance,
a voltmeter (0 - 10 V),
a milliammeter (0 - 500mA), a battery,
a rheostat,
a tap key,
connecting wires.

Internal Resistance of Primary Cell Experiment Potentiometer for std 12

Internal Resistance of Primary cell With the help of Potentiometer
EXPERIMENT :- 7
Internal resistance of primary cell
AIM :
To find the internal resistance of a primary cell, by calculation and from a graph, with the help of a potentiometer.
PRINCIPLE :
It works on the principle of potentiometer.
Apparatus:
A potentiometer having a long (~400 cm) resistive wire of uniform cross-section, a battery E of 3 to 4 V, a primary cell ( dry cell or Laclanche cell or a Daniel cell), two rheostats [ 0 – 25 W (Rh1) and 0 – 500 W (Rh2) ], a galvanometer, a R.B.(0 – 50 W), two simple keys and a jockey.

Internal Resistance of Primary Cell Experiment Apparatus

Internal Resistance Of Primary cell wiring diagram experiment

Internal Resistance Of Primary cell Observation table 

Internal Resistance Of Primary cell with graph 

Internal Resistance Of Primary cell Slop Experiment

Internal Resistance of Primary cell With Potentiometer Experiment Video

Copper voltameter Experiment for std 12 Physics with animation Video

AIM :-
Connect given copper voltameter in an appropriate circuit determine the electro chemical equivalent of copper.
PRINCIPLE :-
On passing electric current through CuSO4 solution, Cu+2 and SO-24 ions are separated or chemical effect of electric current.

APPARATUS :-
A copper voltameter,
6 V battery ( or D.C. Mains),
an ammeter,
a rheostat,
a simple key,
sand paper,
a stop-watch, balance,
weight box, etc.

Copper Voltameter Experiment  Apparatus

PRECAUTIONS
The cathode plate should be throughly cleaned after rubbing with sand paper.
Pass only that much current as is obtained from the calculation of the area of the immersed part of the cathode plate.
Use only a fresh solution of CuSo4. To prepare the solution dissolve about 25 g of CuSO4 crystals in 100 cm3 water. Add a few drops of sulphuric acid (H2SO4) to make it more conducting.
Hold the plate from its upper end so as to avoid touching its surface.
Cathode plate should be washed immediately after it is taken out of the solution.

Copper Voltameter  Experiment Line Diagram

Copper Voltameter  Wiring Diagram for Std 12 Experiment

PROCEDURE :-

1. To Cathode plate dip in clean water, and wash off all the CuSO4, solution sticking to it. Thereafter wash it again with tap water.
2. Hold it in the sunshine for some time till it dries out. Now find out its mass by Physical balance.

Observation table for Copper Voltameter

Copper Voltameter Experiment Observation Table

Copper Voltameter  Experiment Calculation

Copper Voltameter Experiment presentation Video.

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