1st Year Fsc Physics Online Test With Answers

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1st Year Fsc Physics Online Test

Sr. # Questions Answers Choice
1 In sonar we use Sound waves Ultrasound waves Microwaves Radio waves
2 The apparent change in the pitch of sound due to relative motion is called. Carnot theorem Interference Doppler effect Beats
3 Stars moving away from Earth show a Green shift Blue shift Red shift Yellow shift
4 The pitch of sound deepens upon Intensity of sound Loudness of sound Wavelength of sound Frequency of sound
5 Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is. 2 l 1/2 4 l l
6 The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is. 4 l 2l l 1/4 l
7 A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is 4 m 2 m 3 m 1 m
8 A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is. 15 Hz 30 HZ 60 Hz 480 Hz
9 Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will Decrease Unchanged Half Increases
10 If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is. 1m 2 m 3 m 4 m
11 A set of frequencies which are multiples of the fundamental frequency are called. Doppler effect Nodal frequencies Beat frequencies Hamonics
12 In stationary waves the points which always remain at rest are. Nodes Antinodes Crest Trough
13 In stationary waves, the velocity of particle at the node is. Maximum Infinite Zero Varible
14 The periodic variations of sound between maximum and minimum loudness are called. Doppler's effect reflection Laplace correction Beats
15 In order to produce beats, the two sound waves should have. The same amplitude Slightly different amplitude The same frequency slightly different frequencies.
16 Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is. 2 258 516 4
17 Beats can be heard when difference of frequency is not more than. 8 Hz 10 Hz 4 Hz 6 Hz
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