Conceptual Questions. Explain your answers and include appropriate diagrams and

Question

Conceptual Questions. Explain your answers and include appropriate diagrams and drawings Use (and state) the concepts and principles we covered in class to explain your reasoning. 1.) The circuit below shows four identical light bulbs, A, B, C, and D. (a) Rank the brightness of bulbs A-D. (b) What happens to the brightness of bulbs A, C, and D if bulb B burns out (and causing a break in that path)? Explain your reasoning using the fundamental physics principles and definitions we covered in class.

Explanation / Answer

the bulbs have same resistance (R)

Rab = 2R

Rcd = 2R

total resistance = (2R*2R)/(2R+2R) = R

current through the each bulb = V/R

power P = I^2*R

all the bulbs have same bright ness

_____________

after the B bulb burns out

no current flows in A B part

total current flow through c , D

total resistance = 2R

I' = v/2R

current in the circuit decreases

P = I'^2*R

the bright ness of C , D decreases

A does not glow

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.