The resistance of a resistor is 176 ohms. How many of these resistors should be connected in parallel so that their combined current from a 220 volt supply line equals 5 amps?
The resistance of a resistor is 176 ohms. How many of these resistors should be connected in parallel so that their combined current from a 220 volt supply line equals 5 amps?

Answer:

given that

I = 5 amp

 

V = 220 V

 

R = V/I = 220/5 = 44 ohm

 

The resultant resistance must be less than 176 ohm. Therefore, the resistors are connected in parallel

 

Let the required no be n

 

Rre = 176/n = 44

 

N = 176/44 = 4