Heat produced by a resistor is generally a desirable effect.

More Questions from Ohm's Law

• Doubling the voltage across a resistor will cut the current by half.
• The current through a resistor can be found by dividing the resistor's voltage by its ohmic value.
• If the current in the given circuit is increased to 24 mA, the source voltage must have tripled.
• Generally, increasing the resistance in a circuit will decrease the current.
• The voltage drop across a resistor is simply a difference of potential across that resistor.
• Power is a measure of how fast current is flowing.
• Current and voltage have a nonlinear relationship.
• The value of a resistor is in direct proportion to its power handling capabilities.
• Using 4 kWh of power is equivalent to using 2000 W of power for 2 h.
• ___ is a better way of expressing 7,500,000 W.

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