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ATT Test 7 Questions and Answers 100% Correct | New Update 2025
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ATT Test 7 Questions and Answers 100% Correct | New Update 2025
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ATT Test 7 Questions and Answers 100% Correct |New Update 2025
Pulsating DC - ANSWER Current that varies in amplitude but does not reverse
polarity `Not alt. Current because polarity remains the same
Protection. - ANSWER Optional section in an scr power supply. Prevents
damage to power supply from excess current flow
AC to DC - ANSWER Diode reflectors
Power Supply - ANSWER AC to DC
Half Wave Diode Reflector - ANSWER AC to DC
(VDC=VPeak of secondary x .318)
Full Wave Diode Rectifier - ANSWER AC to DC
VAVG= [VPP/2] x .636
If center tapped:
VAVG= [VPP/4] x .636
Diodes preform reflection
180° out of phase
Bridge Diode Rectifier - ANSWER Only conducts if forward biased
(VAVG= VPEAK x .636)
, Output: pulsating DC
Half Wave rectifier freq - ANSWER Ripple req: same as input freq
Full wave rectifier freq - ANSWER Ripple freq: twice input freq
With half VPEAK output
Bridge rectifier freq - ANSWER Ripple freq: twice input freq
Output: twice the voltage of a fullwave
Applied voltage is taken across the full potential of the transformer - ANSWER
Advantage of a Bridge vs Fullwave
Voltage regulators purpose - ANSWER Adjust voltage to maintain Eout at a
constant level
Zener diode normal operation - ANSWER Fwd biased: low ohms
Rev biased: high ohms
Zener diode - ANSWER Series voltage regulator
Efficiency of a full wave vs half wave - ANSWER Full wave is more efficient
because an output is developed for entire wave form
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