Does this make any sense, and can you give me an answer?

Question

V = I x R

#1 10 ohms

#2 20 ohms

#3 30 ohms

Total 9 V

What is the voltage across light bulb # 2

Answer 1

are the bulbs is series or parallel or a combination?  

Answer 2

This is known as OHMS law.

correctly shown as "E=I x R

where E is the electromotive force (in volts)

I is the current

R is the resistance

for a single bulb in a circuit

given light bulb #2 has a resistance of 20 ohms

and the applied voltage is 9 volts the 'unknown' is the current

the equation becomes I=E/R or 9/20=0.45

expressed as 'miliampres' = 450 ma.

for a series circuit you need to find the total resistance (60 ohms)

this means the total current would be 9/60=.15 amps

now solve to find the individual voltage across each lamp using

E=I x R

Answer 3

The more correct question would be what is the amperage across lightbulb #2, which is 0.45 amps.  You've already given us the voltage (9V).