The fundamental negative charge is the

➢ The atom that gives up some of its electrons is

An electron is a particle which

Elements whose atoms have fewer than 4 electrons in their valency shell are:

The atomic number of an element is dependent upon the

The 1st shell (K) has a maximum of

The 4th shell (N) has a maximum of

Electron arrangement of potassium which has 19 electrons is

A vacuum is a medium :

The type of medium that is the best electrical conductor is

The SI unit of electrical charge is

An electrolyte liquid is

The process used to make some non-conducting liquids conduct electricity is

Plasma is the state of matter where some

The field about a charged body is generally represented by lines which are referred to as

Energy contained by an electron by virtue of its motion is

The rate of flow of charge (Q

Therefore Electric current Flow can be said to

Directed drift means

This opposition to current flow is known as resistance (R), and the unit of measure is the

conductivity is the inverse of

Mobile electrons means

current can be calculated by the formula

piezoelectricity cell produces electricity when subjected to

What is the production of electricity by pressure commonly known as

Thermocouple is an example of electricity generated by

Thermocouples generally can be subjected to

On a Photocell the positive potential of the supply source is connected to

The 3 conditions required to produce electricity by magnetism are

The difference in potential between the electrodes in wet cell and dry cell depends primarily on the

Microphone is an example of voltage produced

The capacity of a battery is measured in

The capacity in (ampere-hours) will depend upon

Source voltage is the

If 2 batteries each of 10 V, 20 ampere-hours in parallel they supply 10 ohm load what is the duration they will feed =

The electrolyte is, a solution which

Primary Cell is one in which the chemical action eats away one of the electrodes, usually the

The chemical action that occurs in the cell while the current is flowing causes hydrogen bubbles to form on the surface of the cathode: this action is

Lead Acid Batteries should

Disadvantage of using vents in a battery can be solved by

Capacitors in Parallel

Dielectric breakdown force is measured in

The type of the capacitor used where large amount of capacitance required is called

A capacitor is a device that stores electrical energy in

The relation between the distance between the plates and the charge is

In A variable capacitor (when the plates are over- lapped the capacitance will be

When a capacitor is fully charged and the source voltage is equaled by the counter electromotive force (back-EMF) across the capacitor, the electrostatic field between the plates of the capacitor is

Since the electrostatic field is maximum the energy stored in the dielectric

Magnetism is: the property of a material which enables it to

The two ends which are regain of concentrated lines of force are called

One of the following is not the characteristic of magnetic lines of force

Artificial magnets are

Magnetic lines of force pass through

What magnetic properties is associated with soft iron

Through which material will magnetic lines of force pass the most readily

The degree of magnetization of a material that responds linearly to an applied magnetic field is

In SI units, permeability is measured in

the permeability of free space is

Their relative permeability of a diamagnetic is

When a ferrite core is placed inside a coil, the flux density

The opposition that a material offers to the magnetic lines of force is

The theory of magnetism that corresponds to the direction rotation of Atom within a material is called

The area of the Hysteresis Loop indicates

Magnetic field strength unit is

The unit of flux density is the

The amount of magnetic flux per unit cross sectional area is known as

The intensity of a magnetic field is

The relationship between absolute permeability μ and relative permeability, μr and vacuum permeability μ0 is defined by the formula

Relative permeability of steel is in the range

Fleming’s Left Hand (Motor) Rule

When conductor is cut by magnetic line of force, an EMF is induced

Two inductive coils are close to each other placed 90 degrees the number of flux density is

When a battery is connected across a coil and switch initially closed the

A field twice as strong, cutting twice the number of turn will induce

The inductance of a coil is directly proportional to

The characteristics of an electrical conductor opposes change in current

The inductance of a coil increases as

The time constant of the inductor is =

On an aircraft DC generator the pole pieces are

the most common type used at the A/C

The coil ends connected to adjacent commutator segment

The speed of a series motor is dependent

If the heavy mechanical load is removed from a series motor the speed will

If a DC shunt motor lost its residual magnetism it would

Additional generator poles in a DC motors are provided

The current consumed is decreased as the

Armature reaction is when

To decrease the arcing at the brushes in a high output generators we

In the series motor, the field windings, consisting of a relatively

Number of cycle completed per second

Alternating polarity from an alternator takes on a distinct shape, known as

Root mean square

The peak value of an aircraft 115v single phase is

A sine wave of RMS value 7.06 volts has a peak to peak value of

Peak value

The form factor of an AC waveform can be found by

Square-shaped waveforms always have crest and form factors equal to 1, since

Split phase means

Line voltage with a delta type connection will be

The max. Value of voltage in either (+ve) or (– ve) direction is