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 1181: When white light is dispersed by a spectrometer, the component having the shortest wavelength is
Options:
A) orange
B) green
C) violet
D) red
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The correct answer is C .
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Question 1182:
A source of sound produces waves in air of wavelength1.65m. If the speed of soundin air is 330ms, the period of vibration in air is?
Options:
A) 200
B) 0.005
C) 0.5
D) 0.02
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The correct answer is B .
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Question 1183:

The wave motion above has a frequency
Options:
A) 0.1Hz
B) 0.2Hz
C) 5Hz
D) 10Hz
E) 100Hz
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The correct answer is C .
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Question 1184: A lorry travels 10km northwards, 4km eastwards, 6km southwards, 4km westwards to arrive at a point T. What is the total displacement?
Options:
A) 6km south
B) 4km north
C) 6km north
D) 4km east
Show Answer
The correct answer is B .
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Question 1185: Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?
Options:
A) 2Hz
B) 4Hz
C) 8Hz
D) 258Hz
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The correct answer is B .
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Question 1186:
Transformers are designed so that energy losses are reduced to a minimum. This is achieved through those process.I. Using a soft iron ore
II. Laminating the iron core to reduce energy loses due to eddy current
III. Designing an efficient iron core
Options:
A) I & II only
B) II only
C) I, II, & III only
D) III only
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The correct answer is C .
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Question 1187: A wire P has half the diameter and half the length of a wire Q of similar material. The ratio of the resistance of P to that of Q is
Options:
A) 8 : 1
B) 4 : 1
C) 2 : 1
D) 1 : 1
E) 1 : 4
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The correct answer is C .
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Question 1188: The range of wavelengths of the visible spectrum is 400nm - 700nm. The wavelength of gamma rays is
Options:
A) longer than 700nm
B) shorter than 700nm but longer then 400nm
C) 550nm
D) shorter than 400nm
E) infinite
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The correct answer is D .
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Question 1189: The net charge on the atom is zero because
Options:
A) the electrons and the protons that are charged are in the nucleus
B) the total charge on the electrons is equal to the total charge on the protons
C) the neutrons from a shield around the charged protons
D) the number of electrons in an atom is half the number of protons
E) A and B above
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The correct answer is B .
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Question 1190:
I.Chemical
II.Sound
III.Electricity
Which of the above forms of energy can directly be converted to light energy?
Options:
A) I and II only
B) II and III only
C) I, II and III
D) I and III only
Show Answer
The correct answer is D .