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The SI unit of electrical resistance is represented by which of the following?
Coulomb
Ohm
Ampere
Volt
Ohm
The SI unit of electrical resistance is the Ohm (╬й). It is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere.
The SI unit of electrical resistance is the Ohm (╬й). It is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere.
Think of electrical resistance like the thickness of a water pipe: a thinner pipe (higher resistance) makes it harder for water (current) to flow through, even if the water pressure (voltage) is high.
Remember 'VIR': V=I├ЧR, where V is Voltage, I is Current, and R is Resistance.
R=IVтАЛ тАФ Ohm's Law formula for resistance
R=╧БALтАЛ тАФ Resistance formula based on material resistivity ╧Б, length L, and area of cross-section A
Resistance is governed by Ohm's Law, which states that the current flowing through a conductor is directly proportional to the potential difference across it. Mathematically, it is expressed as R=IVтАЛ, where R is resistance in Ohms, V is potential difference in Volts, and I is current in Amperes.
The SI unit Ohm is named after the German physicist Georg Simon Ohm.
Resistance is a measure of the opposition to current flow in an electrical circuit.
The symbol used for Ohm is the Greek letter capital Omega (╬й).
Design of electronic circuits using resistors
Measuring the conductivity of materials in laboratories
Coulomb is the unit of electric charge.
Ampere is the unit of electric current.
Volt is the unit of electric potential difference.
B is correct тАФ The SI unit of electrical resistance is the Ohm, defined by the relationship 1╬й=1AVтАЛ.
In competitive exams, always distinguish between units of cause (Voltage) and units of opposition (Resistance) to avoid confusion between Volt and Ohm.