Question

What is the voltage of the electricity that is generally supplied to a house ?

• A. $400V$
  
• B. $200V$
  
• C. $220V$
  
• D. $260V$
  

Answer 1

Answer: (C)

$220V$

Worldwide, many different mains power systems are found for the operation of household and light commercial electrical appliances and lighting. The different systems are primarily characterized by the following.

• Voltage
• Frequency
• Plugs and sockets (receptacles or outlets)
• Earthing system (grounding)
• Protection against overcurrent damage (e.g., due to short circuit), electric shock, and fire hazards.
• Parameter tolerances.

All these parameters vary among regions. The voltages are generally in the range 100 to 240 V. The two commonly used frequencies are 50 and 60 Hz. Single-phase or three-phase power is most commonly used today.
In India, a voltage of nearly 220 volts and a frequency of 50 cycles per second is used.

Hence correct option is option C