Question 115Electricity & Electronics - Assistant Engineer

70% to pass

As shown in figure "A" of the illustration, with the switch closed what statement is true if 'R1' and 'R2' have unequal resistance values? Illustration EL-0019

Diagram for USCG Electrical Assistant: As shown in figure "A" of the illustration, with the switch closed what...
AThe energy dissipated in 'R1' will be the same as the energy dissipated in 'R2'.
BThe voltage drop across 'R1' will not be equal to the voltage drop across 'R2'.
CThe current flow through 'R1' will equal the current flow through 'R2'.
DThe current flow through 'R1' will differ from the current flow through 'R2'.
AI Explanation

The correct answer is D) The current flow through 'R1' will differ from the current flow through 'R2'. This is because when 'R1' and 'R2' have unequal resistance values and the switch is closed, the current flowing through each resistor will be different. According to Ohm's law, the current is inversely proportional to the resistance, so the resistor with the lower resistance will have a higher current flow compared to the resistor with the higher resistance. The other answer choices are incorrect because: A) The energy dissipated in each resistor will be different due to the unequal current flows, B) The voltage drops across the resistors will be different due to the unequal current flows and resistance values, and C) The current flows through the resistors will not be equal.

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