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An alarm clock draws 0.5 a of current when connected to a 120 volt circuit calculate its resistance?
Wiki User
∙ 11y ago
240 ohms
Wiki User
∙ 11y ago
Using Ohm's Law (V=IR), we can rearrange the formula to solve for resistance: R = V/I. Plugging in the values, R = 120 volts / 0.5 amps = 240 ohms. Thus, the resistance of the alarm clock is 240 ohms.
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240OHMS
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A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source. What is the current running through the entire circuit?
6
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The current in each branch of a parallel circuit is determined by the voltage across that branch and the resistance of the components in that branch. According to Ohm's Law (I = V/R), the current flowing through a branch is inversely proportional to the resistance and directly proportional to the voltage. Each branch in a parallel circuit will have its own current based on the components connected to it.
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The resistance of the load is what causes an electric current to flow in a circuit.
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What is common to both thevenin and norton theorem?
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What is the relationship between resistance and current in a resistive circuit?
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Use Ohm's Law. In this case, multiply the resistance by the current.
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Because it is a metal so has lots of free electrons which when connected to a circuit detach from the atoms and move around the circuit. This produces a high current, so resistance will be low as current is high.
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If you are looking for the resistance of each resistor in either a series circuit or a parallel circuit you must measure the current I and the voltage V for each resistor. Then calculate its resistance using Ohms Law R = V / I where I = current (Amps), V = voltage (Volts) and R= resistance (Ohms).
