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Electronics Engineering

Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.

24,372 Questions

Telmann washing machine fault E2?

You can contact Telmann in New Zealand on 0800 24 24 37 or (04) 415 6000.

What are three requirement for connecting the transformer in paralle?

Transformer capacity (kvA) shall be identical, Both transformer impedance, secondary voltage and frequency shall be identical.

What is Microwave Gunn oscillator?

Gunn oscillators are widely used in the microwave to Terahertz region.

This uses a metallic coaxial cavity (in effect, a short length of co-axial cable) to provide the resonant effect which has been modelled earlier as an LC circuit. Although it looks very different, the oscillator shares with a laser the use of a cavity. The size of this cavity determines the time/phase delay which sets the resonant frequency. In this case, each diode induced fluctuation travels up the cavity and reflected from the far end, returning to the diode after a time

What is causally related?

If A is causally related to B, then it means that A has caused B.

What is a preset resister?

A preset resistor also known as a poteintometer is a type of resistor whos resistance is selected by the user. A preset maybe of any range i.e. from 1k to 100k or from 1M to 100M.

a preset is used in many circuits where varyin resistance is required

What is the function of Max232?

The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIA-232-F

voltage levels from a single 5-V supply. Each receiver converts TIA/EIA-232-F inputs to 5-V TTL/CMOS levels.

These receivers have a typical threshold of 1.3 V, a typical hysteresis of 0.5 V, and can accept ±30-V inputs.

Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels. The driver, receiver, and

voltage-generator functions are available as cells in the Texas Instruments LinASIC library.

Battery connected to high Resistance voltmeter the reading is 1.5V when it is shorted on a low resistance ammeter the current is 2.5A what is the emf and the internal resistance of the battery?

The Thevenin equivalent circuit of this battery is 1.5V and 0.6 ohms in series. A more exact answer cannot be given without knowing the actual resistance of the 2 meters (I assumed infinite for the voltmeter and zero for the ammeter, as would be for ideal meters).

However I would NEVER attempt this test as you describe it, many types of batteries will explode like bombs when shorted (as they would be when an ammeter was placed across them)! The correct way to do this test safely is with just a voltmeter and an adjustable high wattage resistor.

Why do you need to use a static mat and a wrist strap?

To prevent electrostatic discharge to crucial components regarding the electrical circuit you are performing work on.

You have two devices that are rated at 230 VAC single ph and your supply voltage is 480 VAC 3 ph you need a 480 VAC 3 phase to 230 VAC three phase xfrmer how do you calculate the xfrmer size?

The transformer size is calculated by using the load current that is required on the secondary side of the transformer. This secondary current is multiplied by the secondary voltage times 1.73. This total is then divided by 1000 to give you KVA. KVA = I x E x 1.73/1000.

What is the input and output voltage range of ic7408?

A: The answer deviate from IC to ic . It is defined not as voltage but rather as unit loads. In other words there is a limit to how many inputs can be tied together along with how many units can be driven for reliable operation. So basically is a question of current sink and source for both input and output which strictly relates to reliable triggering voltage levels. If I remember i used the 8 for unit load for the input and 40 unit load for the output. These numbers are general use for design.

Describe the difference of V and Ah in a battery?

V is the batteries rated voltage. Ah is the amp-hour of the battery. This is a rating of how many amps it can supply for a given period of time. For example a 600 Ah battery with a 100 A load means that the battery should last 6 hours.