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3. Electrical fundamentals

If the resistance of a resistor which is in series with two other resistors is doubled

  • the current in that resistance is doubled.
  • the volts drop across that resistor increases.
  • the current in that resistance is halved.

Explanation from PART66Online

In a series circuit the same current flows through every resistor, so doubling one resistor cannot double or halve the current in it alone. Because that resistor now takes a larger share of the total resistance, by Ohm's law (V = IR) the voltage dropped across it increases.

S

Shawez asked · 27 Feb 2015

why cant it be current halved?

Community Comments (1)

K
kahungu 23 Apr 2015
The current in series arrangement is constant hence the p.d increase.

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