Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 It counts 16-bits at a time
 It has to fetch two 8-bit data at a time
 There are 16 address lines
 It facilitates the user storing 16-bit data temporarily

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Microprocessor
When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode

None of the numbers is changed
.5452 E – 3 is changed to 5.452 E – 4 but .9432 E – 4 is not changed
.9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed
Both Ihe numbers are changed and their exponents are, made equal to -5

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