Physics Physics Practice Problems Solutions Library

Power in Circuits Solutions Library

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8 solutions

Power in Circuits

Q. A car's battery produces 12 V and has a charge of 70 A*hr. How long could the battery run a car whose entire electronic system had an equivalent re...

Solved • Mar 1, 2017

Power in Circuits

Q. For most materials, the resistance is actually temperature dependent, and typically increases as temperature rises. For this problem, however, let'...

Solved • Mar 1, 2017

Power in Circuits

Q. A 1500 W hair dyer is designed to be used with an electrical outlet that provides 115 V. What current does the hair dryer draw from the outlet? a....

Solved • Feb 28, 2017

Power in Circuits

Q. The resistivity of gold is 2.44 x 10 -8 Ω•m at a temperature of 20°C. A gold wire, 1.4 mm in diameter and 17 cm long, carries a current of 190 ma. ...

Solved • Jan 10, 2017

Power in Circuits

Q. The resistivity of gold is 2.44 x 10 -8 Ω•m at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 ma. ...

Solved • Jan 10, 2017

Power in Circuits

Q. Which bulb will be the brightest if connected in series? The voltages and wattages shown in the graphs are their nominal settings, not actual value...

Solved • Jan 9, 2017

Power in Circuits

Q. Four identical resistors are connected in series to an ideal battery. The total power supplied by the battery is 10 W. The same resistors are then ...

Solved • Dec 22, 2016

Power in Circuits

Q. A 200-W light bulb is connected across 110 V. What current will flow through this bulb? A) 0.9 A B) 0 A C) 0.6 A D) 1.8 A

Solved • Dec 19, 2016