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GATE EE — free MCQ practice

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GATE EE subjects

Electrical Engineering (65)

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Electrical Circuits & FundamentalsElectric Circuits

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Ohm's law states:Read the answer and worked solution →Kirchhoff's Voltage Law (KVL):Read the answer and worked solution →For series resistors R1, R2, R3, equivalent resistance is:Read the answer and worked solution →Power dissipated in a resistor under DC:Read the answer and worked solution →

Worked practice questions

Ohm's law states:

  1. V = I/R
  2. V = I² R
  3. V = IR (voltage across a resistor = current × resistance)
  4. V = R/I
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Correct answer: C. V = IR (voltage across a resistor = current × resistance)

**Ohm's law:** V = IR. Linear relation for ohmic resistors. **SI units:** V in volts, I in amperes, R in ohms (Ω). **Power dissipated:** P = VI = I²R = V²/R.

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Kirchhoff's Voltage Law (KVL):

  1. Sum of currents = 0
  2. Energy never conserved
  3. Random
  4. Algebraic sum of voltage drops around any closed loop = 0
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Correct answer: D. Algebraic sum of voltage drops around any closed loop = 0

KVL: ΣV around any closed loop = 0. Based on energy conservation (no net energy created/destroyed in closing the loop). Used in mesh analysis.

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For series resistors R1, R2, R3, equivalent resistance is:

  1. Sum: R_eq = R1 + R2 + R3
  2. Just R1
  3. R1 + R2 only
  4. R1 × R2 × R3
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Correct answer: A. Sum: R_eq = R1 + R2 + R3

**Series:** same current through all; voltages add. R_eq = ΣR_i. **Voltage divider:** V_i = V_total × R_i/R_eq. Series sums resistance; parallel reduces it.

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