Question

In the given circuit, the race around condition:

• A. Does not occur
• B. Occurs when clock is zero
• C. Occurs when clock is one, A = B = 1
• D. Occurs when clock is one and A = B = 0

Hint:

Race around → Occurs in JK when J = K = 1 and clock is high long enough to toggle twice.

Answer 1

The Correct Option is C

This is a JK flip-flop circuit. Race around occurs when:
- \( J = K = 1 \)
- Clock = 1
- Propagation delay allows multiple toggles within one clock
Hence, with \( A = B = 1 \), J = K = 1 and clock = 1 → Race around occurs.