Answer: voltage = resistance= 270/10=27
current*resistance electrical circuit would be V=9*30=270 volts.
acc Ohm's Law, where voltage = current x resistance. an electrical circuit would be V = 9 x 30, or V = 270 volts. Now, in a real circuit, if the voltage remains constant and the current changes, the resistance will change proportionally. In this case, it would be 270 = R x 10, or R = 270/10 = 27 ohms. In the same way, adding resistance to a circuit with a fixed voltage reduces the current through the circuit
In inverse proportional relationship, we can simply write the current ratio as 9/10. Then the corresponding changed resistance ratio would be 30/R.