Question

Given below are two statements :
one is labelled as
Assertion (A) and the other is labelled as
Reason (R).
Assertion (A) :
In a synchronous counter, all flip flops toggle simultaneously.
Reason (R) :
All flip flops share the same clock signal.
In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Synchronous = "Same time." Because they share one clock, they act like a well-drilled military unit moving on a single whistle command!

Answer 1

The Correct Option is A

The distinction between synchronous and asynchronous (ripple) counters lies in how the clock signal is distributed to the individual flip-flops. 1. Analyzing the Synchronous Mechanism: In a synchronous counter, every flip-flop in the circuit is connected to a single, common clock pulse. This means that the clock signal arrives at the trigger input of every flip-flop at exactly the same time. 2. Evaluating Assertion (A): Because all flip-flops receive the clock trigger at the same instant, their output states (if conditions are met) change at the same time. This simultaneous behavior eliminates the "ripple" delay found in asynchronous counters. Thus, Assertion (A) is correct. 3. Evaluating Reason (R): The Reason (R) states that they share the same clock signal. This shared connection is the physical cause of the simultaneous toggling described in the assertion. Without the shared clock, they would trigger sequentially. Therefore, (R) is correct and is the perfect explanation for (A).