Energy is constantly fed to a spring oscillator of force constant `225pi^(2)" Nm"^(-1)` and attached mass 0.01 kg at a frequency of 50 cycles per s. Will the resonance be achieved ?

Options

A. Yes
B. No
C. Sometimes only
D. After a long time only.

Answer

B

Explanation

Here `f=(1)/(2pi)sqrt((225 pi^(2))/(0.01))=(1)/(2pi)xx150 pi`
= 75 Hz. Thus no resonance.
Correct choice is (b).