Class 9 Physics Chapter 5 MCQs Federal Board
Class 9 Physics Chapter 5 MCQs Federal Board
Tick the correct option.
1) The most elastic material of the following is:
A) Rubber
B) Wood
C) Glass
D) Steel
Correct option is (d)
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2) Hooke’s law hold good up to:
A) proportional limit
B) yield limit
C) elastic limit
D) plastic limit
Correct option is (a)
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3) A mass of 2 kg is hung by spring, which displaces it through 5 cm. The spring constant is:
A) 400 N/m
B) 40 N/m
C) 4 N/m
D) 4000 N/m
Correct option is (a)
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4) Materials which does not regain its original shape after removal of the load producing deformation are termed as:
A) Elastic materials
B) Plastic materials
C) Rigid materials
D) Hook’s materials
Correct option is (b)
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5) SI unit of pressure is:
A) bar
B) newton
C) psi
D) pascal
Correct option is (d)
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6) Which will exert greater pressure?
$$A)\;3\;g\;needle\;of\;tip\;area\;1\;mm^2\\B)\;4000\;kg\;elephant\;of\;total\;\\feet\;area\;0.5\;m^2$$ $$C)\;A\;girl\;of\;mass\;40\;kg\;wearing\;\\high\;heel\;shoes\;of\;cross-sectional\;\\area\;0.5\;cm^2\\D)\;A\;loaded\;ship\;of\;mass\;2.2\times10^7\\kg\;having\;area\;600\;m^2$$
Correct option is (c)
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7) Pressure of 1000 m bars is equivalent to:
A) 0.1 K Pa
B) 1 K Pa
C) 10 K Pa
D) 100 k Pa
Correct option is (d)
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8) Pressure of 1 mm Hg is equal to:
$$A)\;1.36\times10^{-3}\;atm\\B)\;1\;atm\\C)\;133.29\;atm\\D)\;1.316\times10^5\;atm$$
Correct option is (a)
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9) Atmospheric pressure is commonly measured using a:
A) hygrometer
B) barometer
C) manometer
D) thermometer
Correct option is (b)
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10) Pressure of liquid in a container increase with:
A) base
B) volume
C) depth
D) mass
Correct option is (c)
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11) The atmospheric pressure will be smaller at:
A) Islamabad
B) Peshawar
C) Lahore
D) Murree
Correct option is (d)
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12) A girl of mass 50 kg wears heels with an area of 2 centimeter square in contact with the ground. The pressure she exerts on ground is:
$$A)\;4\times10^{-5}\;Pa\\B)\;4\times10^4\;Pa\\C)\;4\times10^{-4}\;Pa\\D)\;4\times10^5\;Pa$$
No one is correct.
$$F=w=mg\\=50(10)=\;500N\\P=\frac FA=\frac{500}{2\times10^{-4}}\\=2.5\times10^6Pa$$
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13) Drives wear special suits in order to protect them from:
A) low pressure
B) high pressure
C) low temperature
D) high temperature
Correct option is (a)
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14) In a stationary fluid, the local pressure of the fluid vary:
A) with depth only
B) horizontally only
C) both with depth and long horizontal direction
D) neither with depth nor along horizontally direction
Correct option is (a)
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15) The pressure exerted by a man on the surface of earth will be smaller when he:
A) stands on both feet
B) sits on the ground
C) stands on one leg
D) sleeps on the ground
Correct option is (d)
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