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 601: Which of the following statements is correct about light and sound waves? Both
Options:
A) are longitudinal waves
B) are transverse waves
C) have the same velocity in air
D) need a medium for propagation
E) transmit energy
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The correct answer is E .
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Question 602: A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]
Options:
A) 8.0m
B) 5.5m
C) 5.0m
D) 4.5m
Show Answer
The correct answer is D .
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Question 603:
Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?
Options:
A) formation of hydrogen bubbles on the electrode
B) increase in the resistance of the cell
C) local action
D) polarization
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The correct answer is C .
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Question 604: The iron core of an induction coil is made from bundles of wire so as to
Options:
A) minimize eddy-currents
B) generate eddy-current
C) prevent sparking at the contact breaker
D) get the greatest posible secondary voltage
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The correct answer is A .
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Question 605: A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is
Options:
A) 8V
B) 10V
C) 12V
D) 16V
Show Answer
The correct answer is C .
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Question 606: Which of the following quantities has the same unit as the watt?
Options:
A) Force x time
B) Force x distance
C) Force x acceleration
D) Force x velocity
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The correct answer is D .
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Question 607: A closed coil of wire is placed near a magnet. The magnet lies along the axis of the coil. Under which of the following conditions would there be no current in the coil?
Options:
A) When the coil is moved toward the stationary magnet
B) When the coil is moved away from the stationary magnet
C) when the coil is held stationary but the magnet is moved towards the coil
D) when both the coil and the magnet are held stationary
E) when the coil is held stationary but the magnet is moved away from the cell
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The correct answer is D .
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Question 608: The wavelength of a wave traveling with a velocity of 420 ms-1 is 42 m. what is its period?
Options:
A) 1.2 s
B) 1.0 s
C) 0.5 s
D) 0.1 s
Show Answer
The correct answer is D .
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Question 609: A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity
Options:
A) Convex lens
B) Binoculars
C) Concave lens
D) Plane glasses
Show Answer
The correct answer is C .
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Question 610:
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
Show Answer
The correct answer is D .