Rheostat controlling current
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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
Caption: Rheostat varying current in a circuit. A Rheostat (lower right), also known as a variable resistor, has a resistance which can be altered. Ohm's law states that V=IR, where V is voltage, I is current and R is resistance. Voltage is kept fixed in the circuit. So when resistance is increased, current is decreased linearly.
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Keywords: ammeter, amp, ampere, amperes, amps, current, device, electricity, electronic, electronics, experimenting, lamp, light bulb, non-integrated, ohm's law, physical, physics, rheostat, technology equipment, testing, variable resistor, varying, wire, wires
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