rrrr

The current flowing in L and C at parallel resonance are

• different

• zero

• infinite

• equal

The time constant RC has units of:

• none of these

• second/ohm

• second/farad

• 1/second

1 weber is the same as:

• 1 V/s

• 1 T · m2

• 1 T/s

• 1 T/m

Guy wire is used in the construction of distribution lines for what purpose?

• supporting the pole

• protection against surges

• providing emergency grounding

• support the conductor

 

A charged capacitor and an inductor are connected in series. At time t = 0 the current is zero, but the capacitor is charged. If T is the period of the resulting oscillations, the next time after t = 0 that the energy stored in the magnetic field of the inductor is a maximum is

• T

• T /2

• T /4

• 2 T

Which of the following protects a cable against mechanical injury during handling and laying?

I. Armouring

II. Bedding

• Both I and II

• I

• Either I or II

• II

The rating of a circuit breaker is generally determined on the basis of

• Line-to-line fault current

• Symmetrical fault current

• Single line to ground fault current

• Double line to ground fault current

When electrons build up pressure at one point, it is called ___________,

• ganging

• current flow

• impedance

• pressure filing

Diesel power plant is best suited as

• Peak load

• General purpose

• Base load

• Standby

The main reason that alternating current replaced direct current for general use is:

• ac generators do not need slip rings

• electric clocks do not work on dc

• ac voltages may be conveniently transformed

• a given ac current does not heat a power line as much as the same dc current