Resistance Ohm’s Law Power. Current Circuit Current.

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Presentation transcript:

Resistance Ohm’s Law Power

Current Circuit Current

The current from the 3.0 V battery of a pocket calculator is 0.17 mA. In one hour of operation, how much charge flows in the circuit?

Ohm’s Law

The filament in a light bulb is a resistor in the form of a thin piece of wire. The wire becomes hot enough to emit light because of the current in it. A flashlight uses two 1.5 V (effectively a single 3.0 V battery) to provide a current of 0.40 A in the filament. Determine the resistance of the glowing filament

Resistance of a Wire

Power

Rank in order, from brightest to dimmest, the identical bulbs A to D. 1. A = B = C = D 2. A > B > C = D 3. A > C > B > D 4. A > C = D > B 5. C = D > B > A

Rank in order, from brightest to dimmest, the identical bulbs A to D. 1. A = B = C = D 2. A > B > C = D 3. A > C > B > D 4. A > C = D > B 5. C = D > B > A

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