- Can be represented by a single resistor connected in series with a voltage
Short circuit test
- made in the secondary of the transformer
Disadvantage of IC over discrete components.
- low gain
Conductivity of pure silver
- 108.8
Most ICs are
- Monolithic
Half wave voltage doublers
- 2 rectifiers
Lowest ripple voltage output
- LC filter
Wien Bridge
- high frequency/inductance
Wheatstone Bridge
- resistance
The meter sensitivity control of the test equipment would probably be
- Linear taper potentiometer
Which of the following is equal to 1.66 x 10-27 kg?
- Unified atomic mass unit (AMU)
If the hole is considered to be +1 unit, then:
- the electron is considered to be -1 unit
What transformer is operated at 20 Khz – 20 Mhz
- carrier frequency transformer
The derivative of a sinewave
- represents the rate of change
The force that has not been magnetized between a metal and a ferromagnetic material
- is never repulsive
Frequency of sinewave in hertz is:
- 1 divided by the period in seconds
The camera for imaging positron emitters using multilayer silicon detectors is called:
- Compton camera
Selenium is best suited for which application?
- photocells
____ contains BIOS that is read in once the computer is first started
- OS memory
If two waves of the same frequency and the same phase would have a composite wave that has a:
- Magnitude equal to the sum of the two originals
The contact between the metals and heavily doped semiconductors is called
- ohmic contact
The main disadvantage of HOPKINSON’s TEST for finding efficiency of shunt dc motors is that:
- It requires two identical shunt machines
The simplest tube capable of amplification
- Triode
The charging current in the cable
- leads the voltage by 90º
The approximate atomic weight of an element contains:
- The number of protons plus the number of electrons
The IC advantage that translates into less downtime
- reliability
It indicates the ability to reproduce the input variation
- Fidelity
The maximum number of electrons in the P layer of the atomic structure
- 72
The graph between the amplitude ratio and the logarithm of the input signal frequency
- BODE Plot
System which contains microprocessor, memory and input/output interfacing
- microcontroller
The requirement for a DC armature winding is that
- It must be a closed one
The silicon solar cell is usually
- A photovoltaic cell
“Lantern Batteries” are best used in
- 2 way portable radios
Transistor batteries are best used in
- Electronic calculators
Lithium batteries are best used in
- microcomputer memory back up
Solid grounding is adopted in voltages lower than
- 660 V
Resistor grounding is used in voltages ranging from
- 3.3 kV to 11 kV
A stand-alone device which includes microprocessor, memory and in/out interface
- microcontroller
One characteristic of a single phase motor is
- it is not self starting
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