An electron and a proton are both initially moving with the same speed and in the same direction at 90° to the same uniform magnetic field. They experience magnetic forces, which

The permissible variation in supply frequency is

A toroid with a square cross section carries current i. The magnetic field has its largest magnitude:

In a single-phase induction motor, the centrifugal switch is connected where?

The h-parameters of a transistor depend on its

The emf that appears in Faraday's law is:

The units of motional emf are:

A device that establishes an electrical connection to the earth.

The essential condition for parallel operation of two 1-phase transformers is that they should have the same

Solenoid 2 has twice the radius and six times the number of turns per unit length as solenoid 1. The ratio of the magnetic field in the interior of 2 to that in the interior of 1 is:

When a conductor is stationary and the magnetic field is moving or changing, what type of emf is induced?

Which is/are permitted for branch disconnecting means of a second building? I. Inside the building near service entrance II. Outside the building but accessible

The primary function of a fuse is to _____.

If the radius of a pair of Helmholtz coils is R then the distance between the coils is:

What term is used to describe the maximum reverse voltage that can be applied to an ordinary semiconductor diode without damaging itself?

An electron is moving north in a region where the magnetic field is south. The magnetic force exerted on the electron is:

When a dc motor has no-load. what will happen to the back emf?

An electron travels due north through a vacuum in a region of uniform magnetic field B that is also directed due north. It will:

For a loop of current-carrying wire in a uniform magnetic field the if the magnetic dipole moment of the loop is:

The stored energy in an inductor:

Helmholtz coils are commonly used in the laboratory because the magnetic field between them:

The fault current that exists immediately after the fault is known as:

In a diode modulator, what supplies the negative halfwave?

If an electrical network having one or more than one voltage source is transformed into equivalent electrical network with a single current source (which is the short circuit current of previous circuit) with parallel internal resistance of the network with all current source replaced by their internal resistance; the above illustration is called

The characteristics impedance of a loss-less overhead line has a value of

Which of the following conductors has the highest resistance?

In a dc 3-wire distributor using balancers and having unequal loads on the two sides

What is the primary advantage of FM over AM?

Cellular phones operate in the frequency range of

A conductor has seven identical strands of r = 1 cm each. The GMR of the conductor is

_____ bridge is used for measuring an unknown inductance in terms of a known capacitance and resistance

At super conductivity condition, what happens to the resistivity of the material?

Which of the following would cause sparking at the brushes in a dc generator?

The direction of the magnetic field in a certain region of space is determined by firing a test charge into the region with its velocity in various directions in different trials. The field direction

1 weber is the same as:

The magnetic field B inside a long ideal solenoid is independent of:

Dwelling receptacles located ____ m above floors are NOT counted in the required number of receptacles along the wall.

An IC series circuit with an inductance L and a capacitance C has an oscillation frequency f. Two inductors, each with inductance L, and two capacitors, each with capacitance C, are all wired in series and the circuit is completed. The oscillation frequency is:

At one instant an electron is moving in the positive a direction along the x axis in a region where there is a uniform magnetic field in the positive : direction. When viewed from a point on the positive z axis, it subsequent motion is:

Contacts of high voltage switches used in power systems are immersed in oil. What is the purpose of the oil?

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

Which of the following motors has series characteristics?

Gauss-Siedel technique is commonly used in power systems for which of the following?

Heaviside-Campbell Equal Ratio bridge is used for measuring

A low utilization factor for a plant indicates that

The frequency corresponding to half- power point on the response curve of a filter is known as ____

What is the name of the area within a semiconductor diode where no mobile current carriers exist when it is formed?

Once residual magnetism of a shunt generator is lost it may be restored by connecting its shunt field

A 4-way switch controls a lamp from different locations.

Lines of the magnetic field produced by a long straight wire carrying a current are

If both the resistance and the inductance in an LR series circuit are doubled the new inductive time constant will be

James Chadwick got the Nobel Prize for the discovery of which of the following?

The magnetic dipole moment of a current carrying loop of wire is in the positive z direction. If a uniform magnetic field is in the positive x direction the magnetic torque on the loop is:

Induced charge on insulators

The capacitance of a capacitor is _____ relative permitivity?

This is an electrically operated switch which is rated in amperes and is also used in overload protection of motors.

Current reactors are used to _____

An SCR combines the features of

When an alternator connected to a bus bar is shut down, what happens to the bus bar voltage?

The PIV of a half-wave rectifier circuit with a shunt capacitor filter is

A hydrogen atom that has lost its electron is moving east in a region where the magnetic field is directed from south to north. It will be deflected:

If the reverse bias voltage of a PN junction is increases within the limits, the reverse saturation current will ________

A circuit having identical properties in either direction is called _____

Which of the following is not included in the evaluation of the Technical Performance of a Distribution System according to Philippine Distribution Code (PDC)?

If R is the distance from a magnetic dipole, then the magnetic field it produces is proportional to:

In circuit breaker the time duration from the instant of fault to the instant of energizing of the trip coil is known as

Which of the following quantities are known on the generator bus?

For a load bus of a power system, the specified quantities are:

Which of the following shall be included in the calculation of the reliability standard indices of the distributor asset by the Philippine Distribution Code?

A toroid with a square cross section carries current i. The magnetic field has its largest magnitude:

If the average value of a periodic function over one period is zero and it consists of only odd harmonics then it must be possessing ___symmetry.

The unit "henry" is equivalent to:

A magnetic field exerts a force on a charged particle:

What is the burning hours that should be used in the design consideration of incandescent bulb?

In a dc machine, the biggest eddy current loss occurs when?

The presence of earth alters the

Which one is a cause for the over voltage surges in power system?

The rapid exponential decay in just a few cycles of the charge on the plates of capacitor in an RLC circuit might be due to:

A synchronous motor is cheaper than a 3-phase induction motor for which of the following load conditions?

With reference to armature windings, wave windings are often called ______ windings.

In a capacitor-start motor, what is the phase displacement between the starting and running windings?

An electric field is associated with every:

A constant current is sent through a helical coil. The coil:

Which of this is not a factor in the selection of fuse rating for protection of a branch circuit.

A toroid has a square cross section with the length of an edge equal to the radius of the inner surface. The ratio of the magnitude of the magnetic field at the inner surface to the magnitude of the field at the outer surface is:

According to Flemming's rights hand rule for finding the direction of the induced emf, the forefinger points the direction of which of the following?

For power factor correction of a welding transformer, a capacitor is usually connected where?

Which one is the formula to solve the dynamic impedance of a parallel resonant circuit?

What is the device function number for overcurrent relay?

In a power system, each bus or node is associated with how many quantities?

Transformer breaths in when

A long straight cylindrical shell carries current i parallel to its axis and uniformly distributed over its cross section. The magnitude of the magnetic field is greatest:

A load curve indicates

The magnetic coupling between the primary and secondary windings of a transformer can be increased by which of the following methods?

Which one is true about an alkaline cell in comparison to a carbon-zinc cell?

Faraday's law states that an induced emf is proportional to:

The voltage of a bus can be controlled by controlling the

The impedance of an RL series circuit is definitely increased if:

Factors involved in fixing tariff are

It is defined as the total number of sustained Customer power Interruptions within a given period divided by the total number of Customers served within the same period.