1 . What is Ohm' s law ? How can it be verified ?
2. What is the (1) maximum (2) minimum resistance that can be secured by combination of four coils of resistances 4 ohm , 8 ohm , 12 ohm and 24 ohm ?
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1. Ohm's law is a formula used to calculate the relationship between voltage, current and resistance in a electric circuit.
To verify ohm's law we need to measure voltage across the test resistance RT and current passing through it.
2. maximum resistance Rs = R1+R2+R3+R4
= 4+8+12+24
=48ohm
minimum resistance Rp= 1/R1+ 1/R2+1/R3+1/R4
=1/2 ohm.
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