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 2361: Three capacitors of capacitance 2μF, 4μFand 8μF are connected in parallel and a P.D of 6V is maintained across each capacitor, the total energy stored is
Options:
A) 2.52 x 10-6J
B) 6.90 x 10-6J
C) 2.52 x 10-4J
D) 6.90 x 10-4J
Show Answer
The correct answer is C .
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Question 2362:
I. Mass
II. Density
III. Temperature
IV. Nature of substance
Which of the above affect diffusion?
Options:
A) I and II only
B) I,II and IV only
C) II, III and IV only
D) I, II, III and IV
Show Answer
The correct answer is B .
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Question 2363: Which of the following is TRUE of the particles emitted in radioactive disintegration?
Options:
A) the alpha particle is the helium nucleus H
B) the alpha particle is lighter than the beta particle
C) the alpha particle is deflected more than the beta particle in a magnetic field
D) the beta particle is deflected more than the alpha particle in a magnetic field
Show Answer
The correct answer is D .
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Question 2364:
Which of the units of the following physical quantities are derived?
I. Area
II. Thrust
III. Pressure
IV. Mass
Options:
A) I, II, III and IV
B) I, II, and III only
C) I, II, and IV only
D) I and IV only
Show Answer
The correct answer is B .
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Question 2365:
A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)
Options:
A) 0.875m
B) 0.625m
C) 0.335m
D) 0.125m
Show Answer
The correct answer is A .
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Question 2366:
Which of the following liquid is a poor conductor of electricity?
Options:
A) Distilled water
B) Tap water
C) Sea water
D) Drinking water
Show Answer
The correct answer is A .
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Question 2367: Which of the following is TRUE of light and sound waves?
Options:
A) they both transmit energy
B) they both need a mediumfor propagation
C) they are both transverse waves
D) their velocities in air are equal
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The correct answer is A .
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Question 2368:
If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be
Options:
A) circular
B) oscillatory
C) rectilinear
D) rotational
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The correct answer is A .
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Question 2369: For a short sighted person, light rays from a point on a very distant object is focused
Options:
A) in front of the retina
B) on the retina by a converging lens
C) behind the retina by a diverging lens
D) in front of the retina, a distance 2F from the lens
Show Answer
The correct answer is A .
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Question 2370:
The lower fixed part of a faulty thermometer reads 2°C while the upper fixed point is 100°C.
What is the true temperature when the thermometer reads 51°C?
Options:
A) 52°C
B) 50°C
C) 49°C
D) 46°C
Show Answer
The correct answer is B .