explain about ohms law experiment class ten
Answers
Answer:
your answer is as followed
Explanation:
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists. E = I x R.
Answer:
Aim:
To study the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance (R). Also plot a graph between V and I.
Materials Required
A voltmeter and ammeter of suitable range, resistance wire or resistor, some connecting wires, a key, a dry cell (or battery eliminator), a rheostat and a piece of sand paper.
Theory/Principle
Ohm’s Law
The dependence of current on potential difference can be studied by Ohm’s law. According to Ohm’s law, the potential difference (V) across the ends of a resistor is directly proportional to the current (I) through it provided its temperature remains the same.
i.e. V ∝ I
or
V/I = Constant = R
or
V = RI
Here, R is a constant for the given resistor at a given temperature and is called its resistance. The SI unit of resistance is ohm (Ω).
The graph between the potential difference across the two ends of a resistor and the current passing through it is a straight line passing through the origin. The slope of this straight line graph gives the resistance R of the resistor.
Procedure
Before starting the experiment, note down the range, least count and zero error (if any) of the ammeter and voltmeter.
Wipe the ends of the connecting wires with sand paper to remove any insulating layer.
Make a set up of the circuit by connecting different components with the help of connecting wires as shown in Fig. 1(a).