Two of Maxwell's equations contain a path integral on the left side and an area integral on the right. For them:

An electrical insulator is a material:

The sum of the kinetic and potential energies of a system of objects is conserved:

To make an uncharged object have a positive charge:

A body at rest in a system is capable of doing work if:

When the frequency of the oscillator in a series RLC circuit is doubled:

Two objects interact with each other and with no other objects. Initially object A has a speed of 5 m/s and object B has a speed of 10 m/s. In the course of their motion they return to their initial positions. Then A has a speed of 4 m/s and B has a speed of 7 m/s. We can conclude:

A good example of kinetic energy is provided by:

Gauss' law for magnetism tells us:

The center of mass of a uniform disk of radius R is located:

The magnetic field lines due to an ordinary bar magnet:

Grid and Distribution System Installation and maintenance are governed by which of the following?

A nonconservative force:

When a hard rubber rod is given a negative charge by rubbing it with wool:

What is the allowable voltage drop for distribution system?

Maximum efficiency of halfwave rectifier

The statement that magnetic field lines form closed loops is a direct consequence of:

In a synchronous motor, the motor copper losses are met by

A force on a particle is conservative if:

The wound spring of a clock possesses:

Which of the following statements regarding transformers is FALSE? (A) The copper losses (I?R) in the primary and secondary coils are equal. (B) Transformer power losses are generally low, approximately 1-3%. (C) Power losses in transformers are converted to heat, which is then dissipated. (D) One three-phase transformer weighs more than three equivalent single- phase transformers.

Only if a force on a particle is conservative:

In an RLC series circuit, the source voltage is leading the current at a given frequency f. If f is lowered slightly, then the circuit impedance

According to Gauss' law for magnetism, magnetic field lines:

The efficiency of thermal power plant is approximately

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

It is known also as cold standby reserve

To make an uncharged object have a negative charge we must:

An RIC series circuit, connected to a source E, is at resonance. Then:

The charge on a glass rod that has been rubbed with silk is called positive:

A golf ball is struck by a golf club and falls on a green three meters above the tee. The potential energy of the Earth-ball system is greatest:

A conduit band needed if the conduit end is running through an outlet box for connection of lightning fixture, convenience outlet, etc.

Which of the following statements about induction motors is FALSE? (A) They are used to increase the line power factor. (B) They have no slip rings, no brushes, and no excited field current. (C) They have no commutators and no windings on the armature. (D) Squirrel-cage induction motors operate at essentially constant speeds.

Two particles interact by conservative forces. In addition, an external force acts on each particle. They complete round trips, ending at the points where they started. Which of the following must have the same values at the beginning and end of this trip?

Maximum of fullwave rectifier

No kinetic energy is possessed by:

Given a potential energy function U(x), the corresponding force F is in the positive x direction if:

The core of a transformer is made in a laminated form to:

The terminal for size 50 sq. mm cooper conductor without any markings to indicate the temperature rating of the terminal is assumed to have a minimum terminal temperature rating of:

The thermal energy of a system consisting of a thrown ball, Earth, and the air is most closely associated with:

Which of the following is FALSE regarding rotating machinery? (A) The avoidance of harmonics in the production of a sine wave can be achieved by using a coil having multiple loops passing through adjacent slots rather than using only one pair of slots. (B) Uniformity in the production of flux on a pole can be obtained by using distributed field windings over a portion of the rotor surface. (C) AC generator ratings are usually given in units of kVA (kilovolt amps). (D) At zero power factor, the generator delivers real power to a load.

A squirrel-cage motor has such low resistance that it draws excessive currents when starting. Which of the following actions will NOT reduce this problem?

The filament of incandescent lamp is made of

Operating stick for disconnect switches is made of

An alternating current with a frequency of 60 Hz is passed through a moving coil galvanometer that measures DC current. What will the galvanometer reading be equal to? (A) the peak value of the AC current (B) the average value of the AC current (C) the rms value (D) a negligible amount

A single-phase induction motor is not self-starting. Instead, auxiliary methods must be used, such as varying inductance, resistance, and capacitance. Which of the following is FALSE regarding this situation? (A) A capacitor motor uses capacitance to split the phase, resulting in two phases almost 90° apart. (B) Capacitor motors have lower starting torque than comparably sized single phase induction motors. (C) To obtain a higher reactance, a capacitor can be used when starting and then be switched out of the circuit by mechanical means. (D) If the capacitor remains in the circuit, the power factor will have a value close to unity.

The common dry cell gives a voltage of about

According to the Philippine Electrical Code at an ambient temperature of 30°C, 8.0 mm2 copper conductors with the following insulation have the following ampacities: TW insulation - 30 A; THW insulation - 45 A; for THEN insulation - 50 A. if each of these insulated wires carries the same amperes which will generate heat the fastest?

Which of the following statements about AC generators is FALSE? (A) The poles of an AC generator are located on the rotor. (B) The three main types of AC generator are direct-connect engine driven, water driven, and turbine driven. (C) An AC generator uses commutators. (D) Large turbine driven generators usually have two pole rotors to accommo date the high speed of the turbine.