23EEE201 Technical Quiz MDE

Ohm’s law is not applicable to…

• vacuum tubes

• carbon resistors

• high voltage circuits

• circuits with low current densities

Current division rule is valid for….

• series circuit

• parallel circuit

•   both of these

• none of these

In Superposition theorem, while considering a source, all other voltage sources are?

• removed from the circuit

• change its position

• open circuited

• short circuited

In Reciprocity Theorem, which of the following ratios is considered?

• Voltage to current

• Current to current

• Voltage to voltage

• No ratio is considered

As X_L = X_C in a series resonance circuit, the impedance is_____

• purely capacitive

• purely inductive

• purely resistive

• capacitive and inductive

For magnetically coupled circuits, mutual inductance is always _______.

• infinite

• negative

• zero

• positive

The time constant of an R-C circuit is?

• R/C

• RC

• R

• C

The Inductor does not allow sudden change in ___________

• voltage

• phase

• frequency

• current

The wattmeter method is used to measure power in a three-phase load. The wattmeter readings are 400W and -35W. Find the power factor.

• 0.43

• 0.53

• 0.63

• 0.73

. Phase voltages of a star connected alternator are E_R = 240∠0^o V, E_Y = 240∠-120^o V and E_B = 240∠ + 120^o V. What is the phase sequence of the system?

• RYB

• RBY

• YBR

• BRY