Answers 2024/2025
.A " video signal" is defined as: - ANSWER-Baseband including visual information
.A 10W signal is recieved at 5W. This is a ___ dB loss - ANSWER-3
.A block in a digital diagram is called a NOR. Which is true - ANSWER-It is not OR
or inverted OR
.a current carrying capacitor is placed in a magnetic field perpendicular to the
lines of flux. it tends to move in _____ direction to the force of magnetic lines of
flux, as determined by Flemings left-hand rule. - ANSWER-a perpendicular
.a differential amplifier whose two input signals are equal, but 180 degrees out
of phase, will have a/an _____ output - ANSWER-maximum
.A dual trace oscilloscope may have - ANSWER-A Z input for intensity
modulation
.A fuse marked 250v, 650mA can be used in circuits with an open fuse supply
voltage - ANSWER-125V
.A light emitting diode willblight when - ANSWER-It is forward biased
, .a mosfet - ANSWER-amplifies signal voltage variations
.A pc has conventional RAM and ROM memory area (in a pc it is 0 to 640
kilobytes); upper memory area (640 to 1 meg) and extended memory area (
above 1 megabyte). What other names for internal memory types do pc's have?
- ANSWER-Cache
.a PLL, or phase-locked-loop circuit, contains a VCO, or voltage-controlled-
oscillator. the output of the VCO is a/AN - ANSWER-AC variable frequency signal
.A power source such as a generator or battery might be compared to what
component in a water supply system - ANSWER-A pump
.A ripple counter - ANSWER-Is two or more logical flip-flops connected
sequentially with the input pulses toggling the first one.
.A schematic used inelectronic servicing - ANSWER-Shows the location and
arrangment of components in the unit.
.a solid state regulator - ANSWER-varies conduction to maintain a level output
voltage
.A technician must be knowledgeable about ESD. - ANSWER-Because static
discharge can destroy many components
.A thermistor - ANSWER-Changes resistence with temperature