Question

Эдс источника тока 220 В , внутреннее сопротивление 1,5 Ом . Какое сопротивление должно быть у резистора что бы через него протекал ток силой 4 А

Answer 1

E=220 В
r=1,5 Ом
I=4 А
R-?

I=E/(R+r)
R=(E/I)-r
R=(220/4)-1,5
R=55-1,5
R=53,5 Ом

Ответ: 53,5 

Answer 2

Calculating the Resistance for a Current of 4A

To calculate the resistance needed for a current of 4A to flow through a circuit with a 220V power supply and an internal resistance of 1.5Ω, we can use Ohm's law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) between them. The formula is:

V = I * R

Where: - V = Voltage (220V) - I = Current (4A) - R = Resistance (to be calculated)

We can rearrange the formula to solve for R:

R = V / I

Substituting the given values: R = 220V / 4A

Calculation

R = 55Ω

So, the resistance needed for a current of 4A to flow through the circuit is 55Ω.