Percentage of the power of the battery
Question: A 25.0-Ω bulb is connected across the terminals of a 12.0-V battery having 3.50 Ω of internal resistance. What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb?
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Question: A tungsten filament used in a flashlight bulb operates at 0.20 A and 3.2 V. If its resistance at 20oC is 1.5?, what is the temperature of the filament when the flashlight is on?
An aluminum rod with a square cross section is l.3 m long and 5.2 mm on edge. (a) What is the resistance between its ends?
Find the potential difference between the top of the steel rod and the lower end of the copper wire during the current burst.
A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.600 mm2. What is the current in the wire?
A 25.0-Ω bulb is connected across the terminals of a 12.0-V battery having 3.50 Ω of internal resistance. What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb?
Two conductors having net charges of + 10.0µC and -10.0 µC have a potential difference of 10.0 V between them. (a) Determine the capacitance of the system.
A small object is released from rest just below the surface of the water. It takes time t to sink the bottom at depth d. (write the formula for Px) A) what is the density of the object Px?
A potential difference of 100 V produces a current of 3 A in a certain resistor. (a) What is the resistance of the resistor
What is the fractional change in the resistance of an iron filament when its temperature changes from 25.0°C to 50.0°C?
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