Question

Define the SI unit of physical quantity you obtain by calculating the slope of v-i curve

Answer 1

Answer:

The slope of V-I graph gives the value of resistance of a conductor .

It's SI unit is Ohm .

Answer 2

1 Ω or 1 ohm means 1 V potential difference is  produced across the conductor when the  amount of current flowing through it's cross section is 1 Ampere.

• slope of V-I graph gives resistance. resistance means opposition to the current flowing in the conductor.

• this is because of ohm's law which is defined as following:

potential difference across the  wire or conductor is directly proportional to the current flowing in it provided the temperature , pressure and other physical conditions remains unchanged.

• hence:

V = IR

R=V/I

V is potential difference across the wire or conductor

I is the current flowing through the conductor or wire

R is the resistance of the wire

• the SI unit of resistance is ohm or Ω

• 1 Ω or 1 ohm means 1 V potential difference is  produced across the conductor when the  amount of current flowing through it's cross section is 1A.
• 1Ω = 1 volt / 1 ampere

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