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 591:
Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is
Options:
A) 0.75µF
B) 1.33µF
C) 3.00µF
D) 6.00µF
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The correct answer is B .
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Question 592: If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then
Options:
A) no electron will be emitted
B) the few electrons emitted will have a maximum kinetic energy of 1eV
C) the few electrons emitted will have a maximum kinetic energy of 3eV
D) many electrons will be emitted
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The correct answer is A .
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Question 593:
In the above, a voltage V is applied across the terminals P and Q. The voltage across the 1 ohm resistor is
Options:
A) V/8
B) V/4
C) V/3
D) V/2
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The correct answer is C .
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Question 594: The lower and upper fixed points marked on a mecury-in-glass thermometer are 210mm apart. The end of the mercury column in the tube is 49mm above the lower fixed point in a room. What is the temperature of the room in degrees Celsius?
Options:
A) 55.3oC
B) 23.3oC
C) 49.0oC
D) 16.1oC
E) 76.7oC
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The correct answer is B .
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Question 595:
In the molecular explanation, heat is transferred by the
Options:
A) free electrons
B) free atoms
C) free molecules
D) free solids
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The correct answer is A .
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Question 596:
Cathode rays are
Options:
A) High-energy electromagnetic waves
B) protons
C) neutrons
D) streams of electrons
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The correct answer is D .
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Question 597:
I. change of state
II. Diffusion
III. Radiation
IV. Osmosis
Which of the processes above can be explained using the kinetic theory?
Options:
A) I, II,III and IV
B) I, II and III
C) I, III and IV
D) I, II and IV
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The correct answer is D .
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Question 598:
A block of mass 2kg resting on a smooth horizontal plane is acted upon simultaneously by two-forces, 10N due North and 10N due East. The magnitude of the acceleration produced by the force on the block is
Options:
A) 0.10ms-2
B) 7.07ms-2
C) 10.00ms-2
D) 14.10ms-2
E) 20.00ms-2
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The correct answer is B .
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Question 599: The linear expansivity of brass is 2 x 10-5oC-1. If the volume of a piece of brass is 10cm3 at 0oC, what will be its volume at 100oC?
Options:
A) 10.02cm3
B) 10.04cm3
C) 10.06cm3
D) 10.20cm3
E) 102.00cm3
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The correct answer is C .
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Question 600: The difference observed in solids, liquids and gases can be accounted for by
Options:
A) The different molecules in each of them
B) The spaces and forces acting between the molecules
C) Thier melting points
D) Their relative massess
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The correct answer is B .