A three-phase load is balanced if all the three phases have the samea.impedanceb.power factorc.impedance and power factord.none of the above

A three-phase load is considered balanced if all the three phases have the same impedance and power factor. So, the correct answer is c. impedance and power factor.

Here's why:

a. Impedance: In a balanced three-phase system, the impedance in each phase should be equal. This means that the resistance and reactance in each phase are equal.

b. Power Factor: The power factor in each phase should also be equal in a balanced three-phase system. The power factor is a measure of how effectively the current is being converted into useful work output and it is a function of the phase difference between the current and voltage.

In summary, for a three-phase load to be balanced, both the impedance and power factor in each phase should be equal.