Question

Amplitude of a wave is represented by $A = \frac { c } { a + b - c }$then resonance will occur when

• A. $b = - c / 2$
• B. b = 0 and a = - c
• C.
• D. None of these

Answer 1

Answer: (B)

b = 0 and a = - c

Answer 2

$A = \frac { c } { a + b - c }$ when $b = 0$, $a = c$ amplitude

$A \rightarrow \infty$. This corresponds to resonance.