EE 2-1

Which of the following is NOT a property of magnetic field lines?

• The field is stronger where the lines are closer together.

• The lines intersect surfaces of equal intensity at right angles.

• Magnetic field lines have no beginning and no ends.

• The lines cross themselves only at right angles.

Which of the following effects are generally less for an alternating current than for a direct current?

• Heating effects

• Chemical effects

• Magnetic effects

• Impedance

Which of the following cannot have a single unit of 100 MW?

• Hydro power plant

• Steam power plant

• Diesel power plant

• Nuclear power plant

In the left hand rule, thumb always represents direction of the _______.

• Voltage

• Force on conductor

• Current

• Magnetic field

Three 3-ohm resistors are connected in parallel. This combination is then placed in series with another 3-ohm resistor. What is the equivalent resistance in ohm?

• 2

• 3

• 4

• 6

Copper loss of a transformer are determined by means of a/an _______ test.

• Open-circuit

• Polarity

• Short-circuit

• Inductive-circuit

What is/are the main reason/s for using high voltage in the transmission of power in the grid system?

• To transmit bulk power with minimum line losses

• Increase system reliability

• Both I and II

• I only

In which type of electronic communications does the information travel in two directions?

• Half duplex

• Full duplex

• Multiplex

• Bicomm

A voltage divider of two resistors is designed with a total resistance of the two resistors equal to 50 ohm. If the output voltage is 10% of the input voltage, what are the values of the two resistors in the circuit?

• 49.5 and 0.5 ohms

• 40 and 10 ohms

• 42.5 and 7.5 ohms

• 45 and 5 ohms

Which of the following insulators will be selected for high voltage applications?

• Strain type

• Disc type

• Suspension type

• Pin type