V Match the clauses together to make sentences.
A 1 The unfiltered dc provides power to operate lightsand relays for 2 Diode CR1 is a Zener diode that develops aconstant dc voltage 3 If the dc inputvoltage at the top of R1 increases, CR1 will conductharder 4 If thevoltage decreases, CR1 conducts less; 5 If no current flows through R2, the same potentialpresent 6 If thecombined resistance values of R3 and R4 are the sameas 7 Naval aircraft have backup (emergency) electricalpower if 8 The various ways of supplying this emergency power are B a aircraft storage batteries, auxiliary power units, and hydraulic motor driven generators. b if primary sources of electrical power fail. c the resistance of R2, the potential of the outputvoltage and the anode of CR1 are the same d at the input of amplifier A1 and on the anode ofCR1 is the same. e less voltagedrops across R1 f the excess voltage drops across R1. g at the input of amplifier A1,regardless of input voltage fluctuations. h internal operation of the system and feedsa filter network. VISkim the text to discuss the following questions with a partner. 1 What types of secondary power sources do you know? 2 Can you describe the construction of secondary power sources? 3 Can you describe the characteristics of secondary power sources? 4 Can you describe the operating principles of secondarypower sources?
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