Charged bodies attract or repel each other with a force that is directly proportional to the product of their individual charges, and is inversely proportional to the square of the distance between them

Convert chemical energy into electrical energy is done

In a floating the charging rate is determined by

If we have 1.5v 100mA of two cells then the total capacity is

A three phase actuator is often controlled by changeover contactor

If a three phase synchronous AC motor is working with a constant load, if one of these phases is disabled then the motor speed will

The induction motor is

Majority of the motors used throughout the aircraft are design to operate on

The phases in supply 2 phases motor are electrically

To change the direction of the three phase induction motor

The advantage in the used of AC motor besides the wide availability of AC power is

An AC motor to find out the polarity of coil we use

What NP stands for in the following formula RPM = 120*frequency/NP

The synchronous speed a 8-pole motor, built to operate on 400 hertz.115 VAC

The poor starting torque of a three induction motor can be improved

In a 2 phase motor the phases are electrically at

An AC motor rotates at the same speed as the supply frequency

In an AC generator sub-exciter we use

4 pole of a generator with frequency of 400Hz the RPM is

Active power = apparent power x power factor

An aircraft generator is supplying 120kva at a power factor 0.75 lagging

The phase shift between three phases

In a Y wound generator the voltage in a single phase is

The rating of an AC generator

A 4-pole, 1800 RPM generator has a frequency of

The frequency of an alternator is depending on

The main advantage of star generator over a delta wound generator is the

A circuit designed to perform frequency selection is called

Low pass filter and High pass filter connected in series called

Another name for band-stop filters

The diagram is bellow an example of a

Parallel resonant is known as

A high-pass filter's will allow frequency

how much is the input current

If a transformer of 5:1 with Vin=120V supplies a light of 24V/45A how much is the input current

If the input power to a transformer is 650 watts and the output power is 610 watts, what is the efficiency

Radio-Frequency Transformers used to couple circuits to which frequencies

The total voltage induced into the secondary winding of a transformer is determined mainly by

The current transformer are designed to be powering

An autotransformer has

In a transformer the core provides

To reduce eddy-current In a transformer you would

secondary voltage may be either in or out of phase with the primary voltage depends on the

The secondary winding, which receives energy from the primary winding and

The primary winding, which receives

The purpose of the core in the transformer is

the device that transfers electrical energy from one circuit to another by electromagnetic induction is

The power returned to the source by the reactive components of the circuit is

Capacitor discharging: voltage decreasing, inductor charging, current will

In a capacitor the voltage always

power consumed

The power coefficient is defined as

R = 30 Ω XC = 40 Ω FIND IMPEDANCE √2500=

Reactive power for XC=12Ω XL=8 Ω I =2A= (IC)²XC – (IL)²XL

circuit containing capacitor of capacitance C = 50µF and frequency f = 100Hz Xc=

To calculate inductive reactance, you need

In an AC circuit containing resistance and inductance

The unit is Ohm for Inductive reactance(XL) ,capacitive reactance(XC) ,and impedance(Z)

The Form Factor of an AC waveform can be found by

The AC waveform has mark-to-space ratio 0.5 this means

constant direction

The AC waveform has mark-to-space ratio 0.5 this means

OHMS LAW: The current in a circuit is

Ohm's law may be expressed as an equation

Kirchhoff's voltage law

Find the total current THE CIRCUIT BELOW

Measuring internal resistance directly with ohmmeter the meter

THE difference in terminal voltage is caused by

The device which furnishes the electrical energy used by the load

IT = I1 + I2 + I3 divided inversely proportional to the resistance

Example: three 10 resistors connected in parallel with a source voltage of 10V, the voltage drop at each resistor is

If a three resistors each 9 ohms in parallel and a voltage of 3 volt applied what is the l total current

If a three 9 V batteries in series and a load current is 150 mA what is the load total resistance

Find the value of the voltage source

The series circuit has only

The characteristics of a parallel dc circuit are different than those of

A parallel circuit is defined as one

Series and parallel DC circuits have been

Circuits consisting of both series and parallel elements. A circuit of this type is referred to

A break in the circuit means

Two 10 resistors connected in parallel with a source voltage of 5V, the current across each resistor is

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

Good conductors will have

Resistance of the conductor is directly proportional

If a resistor cross sectional area is doubled and the length is halved the resistance will be

Electrical Resistivity: it depends only on the material, and is a property of the material and is

If for an increase in temperature the resistance of a material increases, it is said to have

A material whose resistance decreases with an increase in temperature has

Temperature increase most conductors electrical resistance will

In Color code Resistor the fourth band, which

the total circuit resistance (RT) is equal to

This ability of resistance dissipate heat caused by the resistance is

The heat dissipating capability of a resistor is measured in

Conductance is

The unit of conductance is the

A potentiometer is

When voltage exists but current does not flow because the circuit is open

the basic power formula is

If the voltage is increased the power will

The basic unit of power is the