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 1211: The density of a solid is defined as the
Options:
A) mass of the solid compared to the mass of an equal volume of water
B) amount of water displaced when a unit mass of thesolid is immersed in it
C) weight per unit volume of the solid
D) volume per unit mass of the solid
E) mass per unit volume of the solid
Show Answer
The correct answer is E .
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Question 1212: Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
Options:
A) Alpha rays
B) Gamma rays
C) Positive rays
D) Ultraviolet rays
E) X-rays
Show Answer
The correct answer is E .
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Question 1213: The bond between silicon and germanium is
Options:
A) covalent
B) ionic
C) dative
D) electrovalent
Show Answer
The correct answer is A .
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Question 1214:

In the above circuit, The fuse wire melts when
Options:
A) K is Opened
B) K is closed
C) the 14 ohm resistor is doubled with k closed
D) the 6 ohm resistor is doubled with k closed
Show Answer
The correct answer is B .
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Question 1215: Which of the following pairs of musical instruments produce sound due to the vibration of air column?
Options:
A) Bell and piano
B) Guitar and flute
C) Trumpet and drum
D) Trumpet and flute
E) Violin and organ
Show Answer
The correct answer is D .
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Question 1216:
I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?
Options:
A) II and IV
B) I and IV
C) II and III
D) I and III
Show Answer
The correct answer is A .
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Question 1217:

The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R
Options:
A) Alcohol, mercury and alcohol
B) Air, alcohol and mercury
C) Mercury, alcohol and mercury
D) Air, mercury and alcohol
Show Answer
The correct answer is A .
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Question 1218: A series RLC circuit is said to resonate, when
Options:
A) capacitive reactance is zero
B) conductance is maximum
C) current is minimum
D) impedance is minimum
E) inductive reactance is zero
Show Answer
The correct answer is D .
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Question 1219:

In the diagram above, if the south-poles of two magnets strokes steel bar, the polarities at T and V will respectively be
Options:
A) south and north
B) north and south
C) north and north
D) south and south
Show Answer
The correct answer is C .
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Question 1220: The instrument used by designers to obtain different color pattern is called?
Options:
A) periscop
B) sextant
C) episcope
D) kaleidoscope
Show Answer
The correct answer is D .