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 701:
In fig 6, a ray of light in air strikes a glass plate at an angle of incidence 60 degrees, the reflected ray is observed to be perpendicular to the refracted ray, what is the refractive index of the glass
Options:
A) 1.73
B) 1.50
C) 0.87
D) 0.57
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The correct answer is A .
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Question 702:
I. Coherence
II. Same frequency
III. Same wavelength
IV. Same Intensity
Which of the conditions above are necessary to produce interference fringes?
Options:
A) I and III
B) I, II and IV
C) I, II and III
D) II and III
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The correct answer is C .
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Question 703: Which of the following statements about wave motion is correct?
Options:
A) Electromagnetic waves are transverse
B) Transverse waves do not require a medium for propagation
C) Longitudinal waves vibrate perpendicular to the direction of travel
D) All mechanical waves are longitudinal
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The correct answer is A .
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Question 704: A man whose mass is 80kg climbs a staircase in 20s and expends power of 120W. Find the height of the staircase.[g = 10ms-2]
Options:
A) 1.8m
B) 2.0m
C) 2.5m
D) 3.0m
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The correct answer is D .
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Question 705:
An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance?
Options:
A) 12/13A
B) 13/12A
C) 1/3A
D) 3A
E) 12/7A
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The correct answer is D .
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Question 706: An electron makes a transition from a certain energy level Ek to the ground state E0. If the frequency of emission is 8.0 x 1014Hz The energy emitted is
Options:
A) 8.25 x 10-19J
B) 5.28 x 10-19J
C) 5.28 x 1019J
D) 8.25 x 1019J
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The correct answer is B .
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Question 707:
A man on a bench will exert the greatest pressure on the bench when he
Options:
A) lies flat on his back
B) lies flat on his belly
C) stands on both feet
D) stands on the toes of one foot
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The correct answer is D .
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Question 708: A certain radioisotope of emits four alpha particles and three beta particles. The mass number and the atomic number of the resulting elements respectively are
Options:
A) 219 and 87
B) 84 and 223
C) 223 and 87
D) 219 and 81
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The correct answer is A .
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Question 709:
The efficiency of the pulley system shown above is 80%. find the effort E required to lift the load of 1200N
Options:
A) 275N
B) 325N
C) 375N
D) 573N
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The correct answer is C .
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Question 710: The small droplet of water that forms on the grass in the early hours of the morning is
Options:
A) hail
B) dew
C) fog
D) mist
Show Answer
The correct answer is B .