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Solved: A light bulb glows because it has resistance. The
Chapter 25, Problem 14DQ(choose chapter or problem)
Problem 14DQ
A light bulb glows because it has resistance. The brightness of a light bulb increases with the electrical power dissipated in the bulb. (a) In the circuit shown in Fig. Q25.14a, the two bulbs A and B are identical. Compared to bulb A, does bulb B glow more brightly, just as brightly, or less brightly? Explain your reasoning. (b) Bulb B is removed from the circuit and the circuit is completed as shown in Fig. Q25.14b. Compared to the brightness of bulb A in Fig. Q25.14a, does bulb A now glow more brightly, just as brightly, or less brightly? Explain your reasoning.
Equation Transcription:
Text Transcription:
E
E
Questions & Answers
QUESTION:
Problem 14DQ
A light bulb glows because it has resistance. The brightness of a light bulb increases with the electrical power dissipated in the bulb. (a) In the circuit shown in Fig. Q25.14a, the two bulbs A and B are identical. Compared to bulb A, does bulb B glow more brightly, just as brightly, or less brightly? Explain your reasoning. (b) Bulb B is removed from the circuit and the circuit is completed as shown in Fig. Q25.14b. Compared to the brightness of bulb A in Fig. Q25.14a, does bulb A now glow more brightly, just as brightly, or less brightly? Explain your reasoning.
Equation Transcription:
Text Transcription:
E
E
ANSWER:
Solution 14DQ
Step 1 of 2:
The two bulbs are identical ,so their resistances are equal and equal current flows through both of them as they are connected in series. Therefore, the two bulbs A and B glow equally.