The number of scans of the complete 8-digit display that can be carried out in one second is
A. 15
B. 25
C. 35
D. 55
Answer:A
The number of scans of the complete 8-digit display that can be carried out in one second is
A. 15 B. 25 C. 35 D. 55
Explanation: Starting from either right most or left most digit, every digit glows for 5 msec one by one. Thus one scan of the 8 digit display requires 40 msec. Thus in one second, 25 scans of the complete 8-digit display can be carried out.