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In the circuit shown above, if 5V source is open circuited, then which of the following is TRUE?

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MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper
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  1. R1 is connected in series with R2
  2. R1 is connected in parallel with R2 
  3. R1 is connected in series with R3
  4. R1 is connected in parallel with R3

Answer (Detailed Solution Below)

Option 3 : R1 is connected in series with R3
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Detailed Solution

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Series and Parallel connection of resistances

In series connection, the current (I) is the same through all resistors.

In parallel connection, the voltage (V) is the same through all resistors.

Explanation:

In the given figure, if a 5V source is open circuited then no current will flow through R2.

Now the current from 10V will flow through R1 and R3.

Hence, R1 is connected in series with R3

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