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Amongst which of the following is true about resistance?

4. Amongst which of the following is true about resistance?

1. The level of resistance is always constant
2. Resistance only exists in conductors
3. Individual resistances connected in series have the same effect as a single huge combined resistance
4. All of the above

Answer: C) Individual resistances connected in series have the same effect as a single huge combined resistance.

Explanation:

Individual resistances connected in series have the same effect as a single huge combined resistance, this is because each resistor has the same current flowing through it, and the voltage across the combination equals the total of the voltages across each resistor.