What is the rheostat and variable resistance?
Class 10th ques from electricity
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Actually Rheostat is a Variable resistance, it means we can change the value resistance in the circuit..
According to Ohm's Law -> V = I x R or R = V/I
As per above relation...By Changing resistance in a circuit We can control the flow of electric current in circuit...
If u increase the value of resistance, current starts decreasing and vice versa..
You can undrrstand this as when increase the speed of ceiling fan by regulator , on that time we actually changing the resistance i.e, decreasing the resistance as a result current in a circuit increases and fan rotate faster...
So simply Rheostat is a variable Resistance which is used to control the amount of current in the circuit...
According to Ohm's Law -> V = I x R or R = V/I
As per above relation...By Changing resistance in a circuit We can control the flow of electric current in circuit...
If u increase the value of resistance, current starts decreasing and vice versa..
You can undrrstand this as when increase the speed of ceiling fan by regulator , on that time we actually changing the resistance i.e, decreasing the resistance as a result current in a circuit increases and fan rotate faster...
So simply Rheostat is a variable Resistance which is used to control the amount of current in the circuit...
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