Amplitude of a wave is represented by `A(c)/(a+b+c)` Then resonance will occur when

Options

A. `b=-(a)/(2)`
B. b =0 and a =- c
C. `b= - (c )/(2)`
D. None of these

Answer

B

Explanation

For resonance, the amplitude must be maximum. This is possible, when the denominator of the expression is zero. i.e. a+b+c=0. This is possible for b =0 and a = - c and then `A=(c )/(0) to oo`.