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1.What is the potential difference across a 220-Ώ resistor when a current of 3.50 A flows through it?
2.A 40-W electric lamp draws a current of 0.33A when operated with a potential difference of 120V. What is the resistance of the lamp?
3.A three-cell flashlight draws a current of .60A. What is the operating resistance of the light bulb if each cell provides a potential of 1.0V when delivering this current?
4.The current through an electronic device is measured for several different voltages applied across the device. When the potential difference is 0V, .50V, and .75V, the current is 0A, 0.010A, and .015A respectively. Does the device obey ohm's law?
5.What is an ideal ammeter and an ideal voltmeter? Why are voltmeters connected in parallel? Why are ammeters connected in series?
2.A 40-W electric lamp draws a current of 0.33A when operated with a potential difference of 120V. What is the resistance of the lamp?
3.A three-cell flashlight draws a current of .60A. What is the operating resistance of the light bulb if each cell provides a potential of 1.0V when delivering this current?
4.The current through an electronic device is measured for several different voltages applied across the device. When the potential difference is 0V, .50V, and .75V, the current is 0A, 0.010A, and .015A respectively. Does the device obey ohm's law?
5.What is an ideal ammeter and an ideal voltmeter? Why are voltmeters connected in parallel? Why are ammeters connected in series?