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

Low pass filter and High pass filter connected in series called

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

OHMS LAW: The current in a circuit is

A three phase actuator is often controlled by changeover contactor

The purpose of the core in the transformer is

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

The device which furnishes the electrical energy used by the load

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

Parallel resonant is known as

A break in the circuit means

In Color code Resistor the fourth band, which

Conductance is

Kirchhoff's voltage law

Good conductors will have

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

Active power = apparent power x power factor

Temperature increase most conductors electrical resistance will

Find the value of the voltage source

The current transformer are designed to be powering

A parallel circuit is defined as one

Another name for band-stop filters

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

Capacitor discharging: voltage decreasing, inductor charging, current will

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

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

A high-pass filter's will allow frequency

Measuring internal resistance directly with ohmmeter the meter

how much is the input current

In a transformer the core provides

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

The power coefficient is defined as

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

The rating of an AC generator

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

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

A circuit designed to perform frequency selection is called

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

In a floating the charging rate is determined by

The Form Factor of an AC waveform can be found by

The primary winding, which receives

Ohm's law may be expressed as an equation

This ability of resistance dissipate heat caused by the resistance is

To reduce eddy-current In a transformer you would

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

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

To calculate inductive reactance, you need

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

The unit of conductance is the

In a 2 phase motor the phases are electrically at

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

The heat dissipating capability of a resistor is measured in

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

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

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

Find the total current THE CIRCUIT BELOW

The series circuit has only

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

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

The phases in supply 2 phases motor are electrically

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

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

Radio-Frequency Transformers used to couple circuits to which frequencies

If the voltage is increased the power will

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

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

the basic power formula is

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

power consumed

constant direction

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

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

A material whose resistance decreases with an increase in temperature has

Convert chemical energy into electrical energy is done

the total circuit resistance (RT) is equal to

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

A potentiometer is

In an AC circuit containing resistance and inductance

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

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

The frequency of an alternator is depending on

To change the direction of the three phase induction motor

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

THE difference in terminal voltage is caused by

The basic unit of power is the

In a capacitor the voltage always

Resistance of the conductor is directly proportional

The diagram is bellow an example of a

An autotransformer has

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

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

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

The phase shift between three phases

In an AC generator sub-exciter we use

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

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

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

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

Series and parallel DC circuits have been