Two 7490 decade counters, one configured to count 0 to 9 and the ...

[sabina]

Two 7490 decade counters, one configured to count 0 to 9 and the other 0 to 4, are connected so that the Q3 output of one IC is wired to the clock input of the other IC. What is the modulus of the total circuit?
 
  A) MOD-20 B) MOD-15 C) MOD-50 D) MOD-100

Question 2

In order for an OR gate to be enabled
 
  A) both inputs should be HIGH. B) both inputs should be LOW.
  C) one input should be HIGH. D) one input should be LOW.

[pallen55]

Answer to Question 1

C

Answer to Question 2

D