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Date
A small electrical pump is labeled with a rating of 3 amps and a resistance of 40 ohms. What voltage was it meant to run at?
A nine volt battery is hooked up to a light bulb with a rating of three ohms. How much current passes through the light?
A lamp is plugged into the wall outlet, which is providing 110 volts. An ammeter attached to the lamp shows 2 amps flowing through the circuit. How many ohms of resistance is the lamp providing?
Consider the circuit shown below. What will be the reading on the ammeter?
In a circuit with a 36 Volt battery and a 3A bulb what resistance do you need so that the bulb lights and does not explode?
The greater the pressure, or the difference in potential (Voltage), the greater the amount of current that can flow in a unit time (Amperes). The greater the restriction to flow, the lower the amount current that can flow. What happens to the current as resistance in a circuit increases?
LEDs have minimal resistance to current flow. A 5 volt source can destroy an LED if current is not restricted. From Ohm's Law, if R is 1 W, how much current will try to flow? (An LED drops approximately 1.4V, leaving 3.6V. The maximum current a typical LED can handle is around 30mA, or .030A).
Using the 470W resistor in series with the LED, how much current will be able to flow with a 5V source?