Electronics Trivia 19

Cycle time 

• is the time it takes for a robot to move from 1 location to another location.

The diameter of the original silicon wafer before processing is

• 3 – 8 inches.

A main advantage of the swinburnes test is that

• it is economical and convenient.

How much current in a transistor that will flow through the collector? –

• 95%

The derivative of sine wave 

• is a representation of the rate of change.

Reluctance 

• is the property of a material that opposes the creation of the magnetic flux

What type of meter requires its own power source? – 

• Ohmmeter

A transformer that normally operates at 100 – 150Khz is a 

• Converter Transformer.

A camera for imaging positron emitters using multilayers of silicon detectors is a 

• Compton Camera.

What is done when you make a N – type semiconductor material? –

• Adding of donor  impurities.

Interactions whether desired or undesired in between parts of a control system, can result in a 

• multiple loop control system.

If two waves have the same frequency, the same amplitude but opposite in phase,

• the composite wave is zero.

A metal film resistor has 

• less reluctance than a wire wound type.

The atomic mass unit in grams is the reciprocal of the

• Avogadro’s number.

Ground wire is used to 

• connect a circuit conductor or other devices in an earth plate.

Ferranti Effect – 

• when the load in the receiving end of a long transmission line is removed, the sending end voltage is less than the receiving end voltage

F.T. Bacon -

• designed 1st fuel battery in 1959

Critical Resistance – 

• value of resistance w/c reduces the square root term to zero w/c gives a real, equal and negative roots.

Offset Voltage – 

• potential between amplifier input terminals of op-amp in closed loop condition.

Molecule – 

• atoms of elements join together to form a compound.

Thermistor – 

• detects change in resistance w/ temp.

Diffusion Length – 

• ave. distance covered by an excess charged carrier while diffusion during lifetime.

Differential Amplifier – 

• Subtractor

Speed of Response –

• rapidity w/ w/c the system responds to a change in quantity to be measured.

What is the difference between actual rotor speed and the synchronous speed in induction motor?

• Slip

What type of rotor winding in which heavy conductors are imbedded in the rotor body? 

• Squirrel-cage winding

It is frequently used in digital frequency counter

• LED

Which of the following has the lowest forward voltage?

• Germanium

High temperature metals such as columbium can be easily welded by _______ welding.

• Beam 

The power transfer efficiency from source to load ________ as load resistance increases

• increases

Used in measuring unknown inductance

• Inductance Bridge