Transcription of Circuits - Department of Physics
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Circuits - Department of Physics
PHY2049: Chapter 2731 Circuits The light bulbs in the Circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the sameCircuit II has current of each branchof circuit I, so each bulb is as total power in circuit I is thus 4x thatof circuit : Chapter 2732 Circuits The three light bulbs in the circuit are identical. What is the brightness of bulb B compared to bulb A? a) 4 times as much b) twice as much c) the same d) half as much e) 1/4 as muchUse P = I2R. Thus 2x current in Ameans it is 4x : Chapter 2733 circuit Problem (1) The light bulbs in the circuit are identical. What happens when the switch is closed? a) both bulbs go out b) the intensity of both bulbs increases c) the intensity of both bulbs decreases d) nothing changesBefore switch closed: Va= 12V because ofbattery.
Circuits ÎThe light bulbs in the circuits below are identical. Which configuration produces more light? (a) circuit I (b) circuit II (c) both the same Circuit II has ½ current of each branch of circuit I, so each bulb is ¼ as bright. The total power in circuit I is thus 4x that of circuit II.
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