Question

explain what is resistance.​

Answer 1

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➝ The property of a conductor due to which it opposes the flow of current through it is called resistance.

✪ The resistance of conductor is numerically equal to the ratio of potential difference accross it's end to the current flowing through it.

• $\rm\:Resistance=\dfrac{potential\:difference}{current}$

✪ The SI unit of resistance is ohm which is denoted by the symbol omega(Ω).

✪ The unit of resistance ohm can be defined by using ohm's law.

✪ The resistance of conductor depends on length,nature of material,thickness and temperature of conductor.

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✪ Combination of resistance :-

The resistance can be combined in two ways :-

1. In series
2. In parallel

✪ In series :- When two or more resistances are connected end to end consecutively then,they are said to be connected in series.

✪ In parallel :- When two or more resistances are connected between the same two points then,they are said to be connected in parallel.

Answer 2

Answer:

Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.