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 181: Determine the distance between the consecutive antinodes XX if the wavelength is 66cm
Options:
A) 15cm
B) 30cm
C) 60cm
D) 120cm
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The correct answer is B .
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Question 182: A mass of a liquid at 30oC is mixed with a mass of the same liquid at 70oC and the temperature of the mixture is 45oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid.
Options:
A) 3 : 5
B) 5 : 3
C) 3 : 7
D) 7 : 3
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The correct answer is B .
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Question 183:
An ammeter of resistance 1.0 has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111 is connected across its terminals.
Options:
A) 400mA
B) 450mA
C) 500mA
D) 550mA
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The correct answer is C .
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Question 184: The threshold of frequency for photoelectric effect depends on the
Options:
A) intensity of incident light
B) frquency of incident light
C) material of the photocathode
D) potential difference between the cathode and the anode
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The correct answer is C .
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Question 185:
A bar magnet is divided into two pieces, which of the following statement is correct?
Options:
A) two new magnets are created
B) the magnetic field of each separate piece becomes stronger
C) the electric field is created
D) the bar magnet is demagnetized
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The correct answer is A .
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Question 186:
For the correction of myopic defects in the human eye we require
Options:
A) a convex lens
B) a concave lens
C) a combination of concave and convex lenses
D) a prism
E) a concave mirror
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The correct answer is B .
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Question 187:
One newton × One meter equals?
Options:
A) One water
B) One Joule
C) One ampere
D) One kilogram
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The correct answer is B .
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Question 188: Determine the focal length of a thin converging lens if the power is 5.0 dioptres
Options:
A) 0.1 m
B) 0.2 m
C) 2.0 m
D) 2.5 m
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The correct answer is B .
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Question 189: The relative density of a liquid is the ratio of the
Options:
A) Mass of water to the mass of an equal volume of liquid
B) Upthrust in the liquid to the upthrust in water
C) Density of water to the density of the liquid
D) Upthrust in water to the upthrust in the liquid
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The correct answer is B .
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Question 190: Ripples on water are similar to light waves in that they both
Options:
A) have the same wavelength
B) are longitudinal
C) cannot be reflected
D) travel at the same speed
E) can be refracted and diffracted
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The correct answer is E .