the question. Use this illustration to answer the question. S1 S2 S3 3. In the circuit shown in the figure above, which switches must be closed in order for the
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You need to determine which combination of switches (S1, S2, S3) needs to be closed (turned on) for the light bulb in the circuit to light up. Show more…
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The figure shows the interior of a three-way incandescent lightbulb, which provides three levels of light intensity: 100-W filament 60-W filament S1 120 V S2 The socket of the lamp is equipped with a four-position switch for selecting different light intensities, with the positions described as follows: (1) off (switches S1 and S2 both open), (2) switch S1 closed, (3) switch S2 closed, and (4) switches S1 and S2 both closed. The lightbulb contains two filaments. When the lamp is connected to a 120 V source, one filament receives 100 W of power and the other receives 60 W. What is the total power input (in W) to the light bulb at the following configurations? (a) only switch S1 is closed (b) only switch S2 is closed (c) both switches are closed
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Four identical bulbs, each with a filament resistance of 156 Ω, are connected to a 25-V battery as shown in the diagram below. S1, S2, and S3 represent switches. (a) If S1 and S2 are closed while S3 is open, what is the current through each bulb? bulb 1 bulb 2 bulb 3 bulb 4 (b) If S3 is closed while S1 and S2 are open, what is the current through each bulb? bulb 1 bulb 2 bulb 3 bulb 4 (c) If S2 and S3 are closed while S1 is open, what is the current through each bulb? bulb 1 bulb 2 bulb 3 bulb 4
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Referring to Figure 23.58, what are the directions of the currents in coils 1, 2, and 3 (assume that the coils are lying in the plane of the circuit): (a) When the switch is first closed? (b) When the switch has been closed for a long time? (c) Just after the switch is opened?
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