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The Eiffel Tower in Paris is 324 meters tall, and is made primarily of iron, which has a coefficient of linear expansion of 12 x 10-6. The average low in Paris is 1.00°C and the average high is 24°C. What is average change in height the tower experiences each year?
A cell supplies 5600 J of energy when 4200 C of charge moves completely around the circuit. The load resistor is 7.5 ȍ and the potential difference across the load is 1.1 V. Find the emf, the current through the circuit, and the size of the internal resistance of the cell.
A battery is connected in series with a variable resistor. When the resistor is 8.50 ȍ, the current is 1.00 A and when the resistor is 6.50 ȍ, the current is 1.25 A. What is the value of the internal resistance?
A cell of emf 8.0 V has an internal resistance of 1.7 ȍ and is connected to a 4.9 ȍ resistor. Find the current in the resistor, the power dissipated in the resistor, and the terminal potential difference across the cell.
0.800 watts of power are dissipated in a cell of emf 10.0 volts. If the internal resistance is 2.40 ȍ, find the resistance of the load and the current in the load.
A cell supplies a current of 4.20 mA for 925 hours. What is its rating?
The power dissipated in a resistor is 240 watts when a voltage of 220 volts is across it. If the voltage is cut in half, what is the power dissipation in the resistor?
A 12 ȍ resistor has a potential difference of 4.0 volts. Determine the power dissipated in the resistor.
A 12 volt supply is in series with a resistor and an LDR. In light, the LDR has a potential difference of 3.0 volts and in the dark it has a potential difference of 6.0 volts. Find the ratio of the series resistor to the resistance of the LDR in light.
The resistance of a certain length of wire is 12 ȍ. If the wire is replaced with another wire of the same substance but half the length and twice the diameter, what will be the new resistance?
