Question

write Abstract and introduction about ohm's law experiment (800-100) word:

Abstract:

Introduction:

Answer 1

Abstract:-

In order to study the conditions under which Ohm’s Law (voltage drop across a resistor is proportional to the current passing through it is valid, we measured the voltage-current relations for a lamp filament and a metal-film resistor. The filament showed obvious resistance variations as the power through it was increased, while the metal-film resistor showed a much smaller effect.
The differences reflect temperature differences in the objects themselves, which trace back to the different insulation present for the filament and metal-film resistors.

Introduction:-

Ohm’s Law, V = IR, states that the voltage drop V across a resistor is proportional to current I passing through the resistor [1]. The proportionality constant, R, is known as the resistance and is determined by both material properties (the intrinsic resistivity) and geometry (length and cross-sectional area of the active material). This law is one of many with a similar form, “potential drop” ∝ “current,” that include Fourier’s law of heat conduction (temperature gradient ∝ heat current) and Fick’s law of diffusion (chemical-potential gradient ∝ mass current) [2]. All of these laws are expected to hold when “close
enough” to equilibrium – that is, when the currents that pass are “small enough.” However, it is not obvious just what “small enough” means in practice, nor what happens if the required conditions are not met. In this study, we examine this question in the context of Ohm’s law, by measuring the electrical resistance of a lamp as the current through it is increased.
The drastic change in temperature of the bulb’s filament – from room temperature with no current to white-hot at full current – leads one to anticipate that out-of-equilibrium effects will be important. For comparison, we also look at an ordinary metal-film resistor.