Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 971: Which of the following statements is true about liquid pressure is NOT correct? The pressure
Options:
A) at a point in a liquid is proportional to the depth
B) at any point in a liquid is the same at the same level
C) is exerted equally in all directions at any point
D) of a liquid at any point on the wall of its container acts in a direction perpendicular to the wall
E) at a particular depth depends on the shape of the vessel
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The correct answer is E .
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Question 972:
The branch of physics that deals with the motion of objects and the forces acting on them is called:
Options:
A) Electromagnetism
B) Thermodynamics
C) Mechanics
D) Quantum mechanics
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The correct answer is C .
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Question 973: Thermal equilibrium between two object exist when
Options:
A) the temperature of both objects are equal
B) the quantity of heat of both objects is the same
C) the heat capacities of both objects are the same
D) one object losses heat continuously to the other
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The correct answer is A .
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Question 974: When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The ratio of the specific heat capacity of P to Q is
Options:
A) 1 : 4
B) 4 : 1
C) 1 : 1
D) 2 : 1
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The correct answer is C .
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Question 975: The energy in the nucleus of atoms produce heat which can be used to generate
Options:
A) Kinetic energy
B) Mechanical energy
C) Electrical energy
D) Potential energy
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The correct answer is A .
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Question 976: The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark?
Options:
A) 22.5oC
B) 29.0oC
C) 90.0oC
D) 100.0oC
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The correct answer is A .
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Question 977: The absolute temperature of a perfect gas is proportional to the average
Options:
A) potential energy of the molecules
B) seperation between the molecules
C) kinetic energy of the molecules
D) velocity of the molecules
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The correct answer is C .
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Question 978: In a reverse biased junction diode, current flows in by
Options:
A) positive holes alone
B) majority carriers
C) electron alone
D) minority carriers
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The correct answer is D .
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Question 979: Two liquids L1 and L2 are contained in a U - tube. The height and the density of L1 are 8 cm and 103 kgm-3 respectively. If the density of L2 is 800 kgm-3, its height measured from the same level is
Options:
A) 8 cm
B) 10 cm
C) 16 cm
D) 12 cm
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The correct answer is B .
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Question 980:
A pool of water appears to be 1.00m deep when viewed vertically from above. What is the actual depth of the pool?
[Refractive index of water = 1.33]
Options:
A) 13.300m
B) 0.750m
C) 1.013m
D) 1.330m
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The correct answer is D .