# Engineering MCQs

## Which of the following according to KVL must be zero?

a) Algebraic sum of currents in closed-loop
b) Algebraic sum of power in closed-loop
c) Algebraic sum of losses in closed-loop
d) Algebraic sum of voltages in closed-loop

a) Unilateral
b) Bilateral
c) Linear
d) Conductors

## How does induce emf in DC motor react to supply voltage?

a) It will aid the supply voltage
b) It will be double the supply voltage
c) It will oppose the supply voltage
d) It will be half of the supply voltage

## What does positive power in an electrical element indicate?

a) Element is absorbing power
b) Element is supplying power
c) Element may absorb or supply power
d) Element is neither absorbing nor supplying power

## Which of the following current is drawn by the primary circuit of an ideal transformer when the secondary is open?

a) Secondary current
b) Leakage current
c) Magnetizing current
d) Working on current

## Which of the following according to the fundamentals of electrical engineering is correct about the induced emf in primary of transformer?

a) It is the ratio of primary turns to emf induced per turn
b) It is the product of primary turns and emf induced per turn
c) It is the ratio of secondary turns to emf induced per turn
d) It is the product of secondary turns and emf induced per turn

## Which of the following is correct about the voltage transformation ratio in electrical engineering?

a) Ratio of number of primary turns to the number of secondary turns
b) Ratio of induced emf in secondary to induced emf in primary
c) Ratio of secondary current to the primary current
d) Ratio of power in primary to power in secondary

## Which of the following will happen in a transformer when the number of secondary turns is greater than the number of primary turns?

a) The voltage gets stepped up
b) The voltage gets stepped down
c) The power gets stepped up
d) The power gets stepped down

a) Zero
b) One
c) Two
d) Many

## Which of the following according to KCL must be zero?

a) Algebraic sum of currents in closed-loop
b) Algebraic sum of power in closed-loop
c) Algebraic sum of currents entering and leaving a junction
d) Algebraic sum of voltages across the input and output

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