The time period of a vibrating body is 0.04 s. What is the frequency of the wave produced?
A20 Hz
B25 Hz
C250 Hz
D200 Hz
Answer & Solution
Correct answer: B. 25 Hz
1. Frequency f = 1 / Time period T.
2. f = 1 / 0.04 = 100/4.
3. f = 25 Hz.
_Source: RRB Group D CEN-02/2018 PYQ, Q.14._
Related questions
An automatic but restorable switch that opens on excessive current is a circuit:A metal strip with a low melting point that permanently breaks a circuit is a:A low-resistance path allowing a very large current between terminals is a:The two known hazards of electricity are shock and:That AC voltage swings from peak to peak and back each second a number of times equal to:A 120 V AC supply has a peak voltage swinging to about:Household electricity in the United States is quoted as an rms voltage of:The flow of electric charge in only one direction is called: