Ohm's law physics practical for ITI fitter & GSEB Std 8 & 12

Ohm's Law 

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.

PRECAUTIONS : -

1. All the connections must be tight.
2. Plastic or rubber should not be pressed below the connecting terminals.
3. When current does not flow in a circuit the pointer in both ammeter and voltmeter must be on zero. If it is not so then adjust the pointer on zero or consider the zero error.
4. Range of the meters must be appropriate.
5. Choose a proper scale while plotting the graph so that the graph is sufficiently large and it occupies most part of the graph-paper.

Ohm's Law apparatus

Ohm's law Line diagram

Ohm's law line diagram 

Ohm's law practical

Ohm's law observation table

Ohm's law graph

For more details View Video.

Ohm's Law