An IC optocoupler designed to allow an external object to block ...

[ahriuashd]

An IC optocoupler designed to allow an external object to block the light path between the photoemitter and the photodetector is known as a
 
  A) optical diode B) optointerrupter C) optomiser D) optointerpreter

Question 2

The 7490 decade counter is made up of two internal counters. They are
 
  A) divide-by-2 and divide-by-8. B) divide-by-2 and divide-by-5.
  C) divide-by-2 and divide-by-6. D) divide-by-2 and divide-by-4.

[sultana.d]

Answer to Question 1

B

Answer to Question 2

B