When resistors are connected in series, the current flowing through each resistor is

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ALP CBT 2 Electrician Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. Zero
  2. Different
  3. Same as applied voltage
  4. Constant

Answer (Detailed Solution Below)

Option 4 : Constant
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Parallel Circuit: When resistors are connected with several conducting paths between the sources of emf. In a parallel connection, the voltage remains the same across all resistors, but the current will be different.

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Total resistance \( \frac{1}{{{R}}}= \frac{1}{{{R_1}}} + \frac{1}{{{R_2}}} + \frac{1}{{{R_3}}}\) 

Current in each resistor is different and can be calculated by using Ohm’s law

\({I_1} = \frac{V}{{{R_1}}},{I_2} = \frac{V}{{{R_2}}},{I_3} = \frac{V}{{{R_3}}}\)

The total current is the sum of the three separate currents

\(I = {I_1} + {I_2} + {I_3}\)

Series Circuit: When resistors are connected with only one conducting path they are said to be connected in series. The same current flows through the all resistances but the voltage drop will be different and proportional to the resistance. 

The total resistance in a series circuit is given as

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R = R1 + R2 + R3

In a series connection, the resistances are connected end-to-end

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