Resistors R1= 10ohms, R2= 40 ohms and R3= 70 ohms are connected in series. The total resistance in ohms of this combination is:
A)0 B)120 C)28000 D) not enough info
Resistors in series have an equivalent resistance of the sum of the individual resistances.
Here we have three resistors with individual resistances equal to 10, 40 and 70Ωs. What is the total resistance?
Right!
To calculate the total resistance of resistors connected in a series, you simply need to add up the resistances of each individual resistor. In this case, resistors R1, R2, and R3 are connected in series:
Total resistance = R1 + R2 + R3
Plugging in the given values:
Total resistance = 10 ohms + 40 ohms + 70 ohms
Total resistance = 120 ohms
Therefore, the correct answer is B) 120 ohms.
do I just add them up?
10+40+70=120