23EEE201 Technical Quiz ECE

Voltage division rule is valid for….

• series circuit

• parallel circuit

• both of these

• none of these

The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?

• 18 Ω

• 36 Ω

• 48 Ω

• 64 Ω

The super position theorem is based on the concept of

• Duality

• Reciprocity

• Linearity

• Non-linearity

When source is delivering maximum power to a load, the efficiency of the circuit ...

• Is always 50 %

• Is always 75 %

• Is always 100 %

• Depends on the circuit parameters

The value of current at resonance in a series RLC circuit is governed by

• C

• L

• R

• All of these

Mutual inductance between two magnetically coupled coils depends on

• number of turns only

• permeability of the core only

• cross sectional area of their common core only

• All of the above

The value of the time constant in the R-L circuit is?

• L

• R

• R/L

• L/R

If the roots of an equation are complex and conjugate, then the response will be?

• undamped

• over damped

• under damped

• critically damped

The minimum number of wattmeters to measure power in a 3-phase unbalanced star-connected load is

• 1

• 2

• 3

• 4

In a star connected system, the phase angle difference between line and phase voltages are…

• 30°

• 60°

• 90°

• 120°