What is resistance of conductor Class 10?
Resistance is a property of conductor due to which it resists the flow of electric current through it. Component that is used to resist the flow of electric current in a circuit is called resistor. In practical applications, resistors are used to increase or decrease the electric current.
What is meant by electrical resistance of a conductor state how resistance of a conductor?
State how resistance of a conductor is affected when. (i) a low current passes through it for a short duration. (ii) a heavy current passes through it for about 30 seconds. Electric resistance of a conductor is the obstruction offered by the conductor to the flow of the current through it.
What is electric resistance and its unit?
Electric resistance has the dimension length squared mass per time cubed electric current squared. The SI derived unit of electric resistance is the ohm, which is defined as a volt per ampere.
What is resistance and its unit?
Resistance is the hindrance offered by an object to the flow of current through it. … SI unit of resistance is Ohm (Ω). It is resistance offered by an object when 1 volt potential difference is applied across it and 1 Ampere of current passes through it.
What is the resistance formula?
Resistance has units of ohms (Ω), related to volts and amperes by 1 Ω = 1 V/A. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.
What factors affect electrical resistance?
There are several factors that affect the resistance of a conductor;
- material, eg copper, has lower resistance than steel.
- length – longer wires have greater resistance.
- thickness – smaller diameter wires have greater resistance.
- temperature – heating a wire increases its resistance.
What are the factors on which resistance of conductor depends?
The resistance of a conductor depends on the cross sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive something is the less resistive it is.