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ICSE 9 Physics Question Paper. We covered all the ICSE 9 Physics Question Paper in this post for free so that you can practice well for the exam.
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ICSE 9 Physics Questions Mock test for Students
A sonometer wire AB has a total length of 110 cm. At what distances from end A should two bridges be placed so that the three segments have fundamental frequencies in the ratio 1 : 2 : 3?
a) 30 cm and 90 cm
b) 40 cm and 80 cm
c) 60 cm and 90 cm
d) 30 cm and 60 cm
Option c – 60 cm and 90 cm
A closed organ pipe produces a fundamental frequency of 100 Hz. If the pipe is opened at both ends, the frequencies produced will be
a) 200, 400, 600, 800, …
b) 200, 300, 400, 500, …
c) 100, 300, 500, 700, …
d) 100, 200, 300, 400, …
Option a – 200, 400, 600, 800, …
As the temperature rises, the frequency of sound produced by an organ pipe
a) Decreases
b) Increases
c) Remains constant
d) Varies irregularly
Option b – Increases
Four wires made of the same material and having identical length and diameter are stretched on a sonometer under tensions in the ratio 1 : 4 : 9 : 16. The ratio of their fundamental frequencies is
a) 4 : 3 : 2 : 1
b) 1 : 4 : 9 : 16
c) 16 : 9 : 4 : 1
d) 1 : 2 : 3 : 4
Option d – 1 : 2 : 3 : 4
The three lowest frequencies with which a pipe of length 20 cm, closed at one end, can vibrate are (speed of sound in air = 340 m/s)
a) 425, 850, 1275
b) 425, 1275, 2125
c) 900, 1800, 2700
d) 900, 2700, 4500
Option b – 425, 1275, 2125
In Melde’s experiment, a string forms 4 loops when a load of 50 g is placed in the pan of Mass 15 g. To obtain 6 loops, the approximate weight that must be removed from the pan is
a) 7 g
b) 36 g
c) 21 g
d) 29 g
Option b – 36 g
An open organ pipe has a fundamental frequency of 100 Hz. If one end of the pipe is closed, the frequencies produced will be
a) 100, 200, 300, …
b) 50, 150, 250, …
c) 50, 100, 200, 300, …
d) 50, 100, 150, 200, …
Option b – 50, 150, 250, …
The quantity 0.3D, where D is the internal diameter of a tube, is known as
a) Laplace’s correction
b) Rayleigh’s correction
c) Radiation correction
d) Epoch
Option b – Rayleigh’s correction
A steel rod of length 100 cm is clamped at its midpoint. Its fundamental frequency of longitudinal vibration is 2.53 kHz. The speed of sound in steel is
a) 5.06 km/s
b) 6.06 km/s
c) 7.06 km/s
d) 8.06 km/s
Option a – 5.06 km/s
A pipe P₁, closed at one end, vibrates in its first overtone, while another pipe P₂, open at both ends, vibrates in its third overtone. Both resonate with the same tuning fork. The ratio of the lengths of P₁ to P₂ is
a) 1 : 2
b) 3 : 4
c) 1 : 3
d) 3 : 8
Option d – 3 : 8
An open pipe is suddenly closed at one end. The frequency of the third harmonic of the closed pipe is found to exceed the fundamental frequency of the open pipe by 100 Hz. The fundamental frequency of the open pipe is
a) 200 Hz
b) 300 Hz
c) 240 Hz
d) 480 Hz
Option a – 200 Hz
A stretched wire of length 114 cm is divided into three parts such that their frequencies are in the ratio 1 : 3 : 4. The ratio of the lengths of the three segments is
a) 18 : 24 : 72
b) 24 : 72 : 18
c) 24 : 18 : 72
d) 72 : 24 : 18
Option d – 72 : 24 : 18
A string stretched by a load of 4 kg vibrates in its fundamental mode. The additional load required to produce a note one octave higher is
a) 4 kg
b) 8 kg
c) 12 kg
d) 16 kg
Option c – 12 kg
In a stationary longitudinal wave, the nodes correspond to points of
a) Maximum pressure
b) Minimum pressure
c) Minimum pressure variation
d) Maximum pressure variation
Option d – Maximum pressure variation
In a sonometer experiment, the distance between the bridges is kept constant. A slightly elastic wire emits a sound of frequency n when stretched with tension T. If the tension is increased to 4T, the new frequency produced will be
a) n
b) 2n
c) Slightly greater than 2n
d) Slightly less than 2n
Option d – Slightly less than 2n
We covered all the ICSE 9 Physics question paper above in this post for free so that you can practice well for the exam.
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Also, check out:
- ICSE Physics Class 9 Goyal Brothers Solutions
- ICSE Class 9 Physics Sample Paper
- ICSE Class 9 Physics Question Paper
