Chapter 4: Q9DQ (page 873)
A light bulb is connected in the circuit shown in Fig. Q 26.9. If we close the switch S, does the bulb brightness increase, decrease or remain the same? Explain why.
Short Answer
The brightness increases.
Chapter 4: Q9DQ (page 873)
A light bulb is connected in the circuit shown in Fig. Q 26.9. If we close the switch S, does the bulb brightness increase, decrease or remain the same? Explain why.
The brightness increases.
All the tools & learning materials you need for study success - in one app.
Get started for free(a) What is the potential difference in the circuit of Fig. P25.62? (b) What is the terminal voltage of the battery? (c) A battery with emf and internal resistance is inserted in the circuit at d, with its negative terminal connected to the negative terminal of the battery. What is the difference of potential between the terminals of the battery now?
In the circuit shown in Fig. E26.18,(a) What is the potential difference Vab between points a and b when the switch S is open and when S is closed? (b) For each resistor, calculate the current through the resistor with S open and with S closed. For each resistor, does the current increase or decrease when S is closed?
An electron moves at through a regionin which there is a magnetic field of unspecified direction and magnitude . (a) What are the largest and smallest possible magnitudes of the acceleration of the electron due to the magnetic field? (b) If the actual acceleration of the electron is one-fourth of the largest magnitude in part (a), what is the angle
between the electron velocity and the magnetic field?
Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of and . If the two light bulbs are connected in series across a line, find (a) the current through each bulb; (b) the power dissipated in each bulb; (c) the total power dissipated in both bulbs. The two light bulbs are now connected in parallel across theline. Find (d) the current through each bulb; (e) the power dissipated in each bulb; (f) the total power dissipated in both bulbs. (g) In each situation, which of the two bulbs glows the brightest? (h) In which situation is there a greater total light output from both bulbs combined?
An idealized voltmeter is connected across the terminals of abattery, and arole="math" localid="1655719696009" appliance is also connected across its terminals. If the voltmeter reads (a) how much power is being dissipated by the appliance, and (b) what is the internal resistance of the battery?
What do you think about this solution?
We value your feedback to improve our textbook solutions.