Approximately how many amps does the 300 W lamp draw when lit?

Prepare for the MTA Transit Electrical Helper Exam No. 4612. Study using flashcards and multiple choice questions, each with hints and explanations. Get ready for your test!

Multiple Choice

Approximately how many amps does the 300 W lamp draw when lit?

Explanation:
To determine how many amps a 300 W lamp draws when lit, you can use the formula that relates power (in watts), voltage (in volts), and current (in amps). The formula is: Power (W) = Voltage (V) × Current (A) To find the current in amps, rearrange the formula: Current (A) = Power (W) / Voltage (V) Assuming the lamp operates on a standard voltage, such as 120 V (which is common in residential applications in the U.S.), the calculation would be as follows: Current (A) = 300 W / 120 V = 2.5 A Hence, a 300 W lamp operating at 120 V indeed draws approximately 2.5 amps when lit. This matches the correct choice among the options provided. The other calculations would present values outside the expected current draw for a 300 W lamp at standard voltages, making them less applicable in this scenario.

To determine how many amps a 300 W lamp draws when lit, you can use the formula that relates power (in watts), voltage (in volts), and current (in amps). The formula is:

Power (W) = Voltage (V) × Current (A)

To find the current in amps, rearrange the formula:

Current (A) = Power (W) / Voltage (V)

Assuming the lamp operates on a standard voltage, such as 120 V (which is common in residential applications in the U.S.), the calculation would be as follows:

Current (A) = 300 W / 120 V = 2.5 A

Hence, a 300 W lamp operating at 120 V indeed draws approximately 2.5 amps when lit. This matches the correct choice among the options provided. The other calculations would present values outside the expected current draw for a 300 W lamp at standard voltages, making them less applicable in this scenario.

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