Question

For an ideal battery, closing the switch in the circuit below does not affect the brightness of bulb A. In reality, bulb A will dim just a little when the switch closes. To see why, assume the 1.5 V battery powering the circuit has internal resistance 0.50 ?. A. Calculate the resistance of a lit bulb if the resistivity of the filament at operating temperature is ? = 5.60x10^-8 ?m, the diameter of the filament is d=0.110 mm, and the length of the filament is 1.018 m (yes, they really are that long!). B. What is the current flowing through bulbs A and B when the switch is left open? C. What is the current through bulbs A and B after you close the switch? D. (Choose one of the response options below and explain your reasoning/show your work) How does the current through bulb A change when the switch is open compared to when the switch is closed if we replace the battery with an ideal battery, i.e., r = 0 ?? a. Increases b. Decreases c. Stays the same d. The current through bulb A is so large that it causes the battery to combust.

          For an ideal battery, closing the switch in the circuit below does not affect the brightness of bulb A. In reality, bulb A will dim just a little when the switch closes. To see why, assume the 1.5 V battery powering the circuit has internal resistance 0.50 ?.

A. Calculate the resistance of a lit bulb if the resistivity of the filament at operating temperature is ? = 5.60x10^-8 ?m, the diameter of the filament is d=0.110 mm, and the length of the filament is 1.018 m (yes, they really are that long!).

B. What is the current flowing through bulbs A and B when the switch is left open?

C. What is the current through bulbs A and B after you close the switch?

D. (Choose one of the response options below and explain your reasoning/show your work) How does the current through bulb A change when the switch is open compared to when the switch is closed if we replace the battery with an ideal battery, i.e., r = 0 ??

a. Increases
b. Decreases
c. Stays the same
d. The current through bulb A is so large that it causes the battery to combust.

For an ideal battery, closing the switch in the circuit below does not affect the brightness of bulb A. In reality, bulb A will dim just a little when the switch closes. To see why, assume the 1.5 V battery powering the circuit has internal resistance 0.50 ?.

A. Calculate the resistance of a lit bulb if the resistivity of the filament at operating temperature is ? = 5.60x10^-8 ?m, the diameter of the filament is d=0.110 mm, and the length of the filament is 1.018 m (yes, they really are that long!).

B. What is the current flowing through bulbs A and B when the switch is left open?

C. What is the current through bulbs A and B after you close the switch?

D. (Choose one of the response options below and explain your reasoning/show your work) How does the current through bulb A change when the switch is open compared to when the switch is closed if we replace the battery with an ideal battery, i.e., r = 0 ??

a. Increases
b. Decreases
c. Stays the same
d. The current through bulb A is so large that it causes the battery to combust.

Added by Ricky T.

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