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 301: Particles of mass 10-2kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad-1. If the radius of the blade is 0.2m, the centripetal force is
Options:
A) 2 N
B) 20 N
C) 200 N
D) 400 N
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The correct answer is B .
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Question 302: A car accelerate uniformly from rest at 4 ms-2. How far will it travel in the fifth complete second?
Options:
A) 100 m
B) 50m
C) 32 m
D) 18 m
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The correct answer is D .
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Question 303: A travelling wave moving from left to right has an amplitude of 0.15m, a frequency of 550Hz and a wavelength of 0.01m. The equation describing the wave is
Options:
A) y = 0.15 sin 200π(x - 5.5t)
B) y = 0.15 sin π(0.01x - 5.5t)
C) y = 0.15 sin 5.5π(x - 200t)
D) y = 0.15 sin π(550x - 0.01t)
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The correct answer is A .
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Question 304:
The arrow represents an object in front of a convex mirror whose focal points are X and Y. The image formed is
Options:
A) between X and P
B) Between P and Y
C) Between Y and Z
D) Outside W
E) Outside Z
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The correct answer is B .
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Question 305: in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?
Options:
A) 30V
B) 40V
C) 50V
D) 70V
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The correct answer is B .
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Question 306: A moving coil galvanometer of 300 resistance gives full scale deflection for 1.0mA. The resistance R, of the shunt that is required to convert the galvanometer into a 3.0A ammeter is
Options:
A) 899.70
B) 10.00
C) 0.10
D) 0.01
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The correct answer is C .
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Question 307:
I. Force (N)
II.Torque (NM)
III. Current (A)
IV. Power (W)
Which of the above are the correct S. I: units of the quantities indicated?
Options:
A) I and II only
B) I and III only
C) I, II and III only
D) I, III and IV only
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The correct answer is D .
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Question 308: Which of the following instrument is most accurately for comparing electromotive force (e.m.f) of two cells?
Options:
A) Voltmeter
B) Meter rule
C) Galvanometer
D) Potentiometer
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The correct answer is D .
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Question 309:
In the figure, the value of R is
Options:
A) 3
B) 6
C) 4
D) 5
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The correct answer is B .
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Question 310: Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.
Options:
A) i and iii
B) ii and iii
C) iii and iv
D) i and iv
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The correct answer is D .