Physics Past Questions and Answers

When two notes of nearly equal frequencies are sounded together, a periodic rise and fall in sound intensity can be heard. This phenomenon can be called

A Beats
B Diffraction
C Overtones
D Resonance

Question 3067:

Which of the following instruments is not a wind instrument?

A Clarinet
B Saxophone
C Trumpet
D Xylophone

Question 3068:

Which of the following actions will not cause an increase in the frequency of a vibrating string?

A Increasing the tension of the string
B Decrease the mass per unit lengthof the string
C Decrease the length of the string
D Increasing the cross sectional area of the string

Question 3069:

Which of the following items can be used to compare the relative magnitudes of electric charges on two bodies?

A Ebonite rod
B Gold leaf electroscope
C Proof plane
D The electrophorus

Question 3070:

Three capacitors each of capacitance 18\(\mu F\) are connected in series. Calculate the effective capacitance of the capacitors

A 54.00\(\mu F\)
B 18.00\(\mu F\)
C 6.00\(\mu F\)
D 0.17\(\mu F\)