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 981:
A body starts from rest and moves with uniform acceleration of 6ms-2. What distance does it cover in the third seconds
Options:
A) 15m
B) 18m
C) 27m
D) 30m
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The correct answer is A .
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Question 982:
The equilibrium position of objects in any field corresponds to situation of
Options:
A) equipotential energy
B) maximum potential energy
C) minimum potential energy
D) maximum kinetic energy
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The correct answer is C .
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Question 983: Which of the following is the most suitable for use as an altimeter?
Options:
A) A mecury barometer
B) A fortin barometer
C) A mecury manometer
D) An aneroid barometer
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The correct answer is D .
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Question 984: Cathode rays are
Options:
A) high-energy electromagnetic waves
B) protons
C) streams of electrons
D) neutrons
E) radio waves
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The correct answer is C .
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Question 985: In fleming's right-hand rule, the thumb, the forefinger and the middle finger if held mutually at right angles represent respectively, the
Options:
A) motion, the field and the induced current
B) induced current, the motion and the field
C) field, the induced current and the motion
D) induced current, the field and the motion
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The correct answer is A .
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Question 986: The particles emitted when is
Options:
A) gamma
B) beta
C) electron
D) alpha
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The correct answer is A .
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Question 987: The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?
Options:
A) 1
B) 2
C) 3
D) 4
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The correct answer is A .
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Question 988: Two forces of magnitudes 7N and 3N act at right angles to each other. The angle between the resultant and the 7N force is given by
Options:
A) cos =
B) sin =
C) tan =
D) cot =
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The correct answer is C .
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Question 989: If a solid changes directly into a gas when heat is applied the process is called
Options:
A) vaporization
B) evaporation
C) sublimation
D) ionization
E) conversion
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The correct answer is C .
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Question 990: Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to
Options:
A) heat dissipation
B) production of eddy currents
C) excessive current discharge
D) excessive voltage distance
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The correct answer is A .