4. Two bulbs have a resistance of 20 ohms when working normally. They are placed in a series circuit whey they operate normally. What is the combined resistance of the two bulbs?
(1 Point)
22 ohms
20 ohms
10 ohms
40 ohms

R = 40 ohms

Explanation:

Two bulbs have a resistance of 20 ohms when working normally.

When they are placed in series, the combined resistance is given by :

R = R₁ + R₂

We have, R₁ = R₂ = 20 ohms

R = 20 +20

= 40 ohms

Hence, the combined resistance of the two bulbs is 40 ohms.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates