Is it fine to set 230v on power supply in US?

Consider a Common Emitter amplier circuit, there'll be two inputs present in which one is applied at the base of the transistor and other at collector I want to know 1)what is difference between that two voltages ? 2)need to use both in the same circuit? ...

In India, appliances are 220 volts enabled. However, many Electricity Boards often provide mains power at less than 220 volts. What are the possible reasons? Is it because of technical inefficiency? On the consumer end, if the "actual load" is higher than the "connected load" (as shown by the...

I just purchased a used Kenmore dryer built in 2003. It has markings for 120 and 240 volts. Is this unit dual voltage, and will my existing 220 volt plug wire in with no problems as long as I match the red and black wires? I believe the white wire goes to the center post and the ground will...

Good morning! Excuse me, I don't speak English and I am writing of Brazil with the help of a translating program. A friend gave me a drying one, Kenmore Dryer 80 Series, MOD 110.62852100, to SER. ML3716205, TYPE DWSR-HE-2406028-CV54, and my doubt is on the voltage of this machine, I...