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In a series circuit, if the resistance of one resistor is doubled while the voltage remains constant, the current in the circuit will _____.
Double
Remain the same
Become half
Decrease by 25%
Become half
According to Ohm's law, the current in a circuit is inversely proportional to the resistance when the voltage is held constant. When the resistance is doubled, the current decreases to half its original value.
According to Ohm's law, the current in a circuit is inversely proportional to the resistance when the voltage is held constant. When the resistance is doubled, the current decreases to half its original value.
Imagine water flowing through a garden hose; if you step on the hose to double the restriction (resistance) while maintaining the same water pressure, the water flow rate (current) drops by half.
I=RVтАЛ тАФ Ohm's Law relating current, voltage, and resistance
RtotalтАЛ=R1тАЛ+R2тАЛ тАФ Equivalent resistance formula for series circuits
In a series circuit, the total resistance is the sum of individual resistances. If the resistance of one resistor is doubled, the total equivalent resistance of the circuit increases, which results in a proportional reduction in the total current since I=RtotalтАЛVтАЛ.
Current is inversely proportional to resistance at constant voltage.
Series circuits share the same current through all components.
An increase in total resistance directly decreases the current flow.
Volume control knobs in audio equipment
Dimmer switches and rheostats in electrical appliances
The SI unit of electrical resistance is the ohm (╬й).
Option A is incorrect because current and resistance share an inverse relationship, not a direct one.
C is correct тАФ the current becomes half because current is inversely proportional to resistance at a constant voltage.
Always verify whether components are connected in series or parallel before evaluating how changes in component values affect total circuit parameters.