light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions
light, heat, thermodynamics, wave motion, sound, optics & oscillations PRACTICE TEST [16 - EXERCISES]
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set 16
Question : 12
A bimetallic strip consists of brass and iron. When it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because
a) it is easier to bend an iron strip than a brass strip of the same size
b) brass has a higher specific heat capacity than iron
c) density of brass is more than that of iron
d) brass has a higher coefficient of linear expansion than iron
Answer »Answer: (d)
It is so because brass has a higher coefficient of linear expansion.
Question : 13 [PSC (Pre) 2019]
Which one of the following changes occurs when salt is added into the water?
a) Boiling point is decreased and freezing point is increased
b) Both boiling point and freezing point are decreased
c) Boiling point is increased and freezing point is decreased
d) Both boiling point and freezing point are increased
Answer »Answer: (c)
Question : 14 [UPPCS (Pre) 2010]
Which one of the following statement is not true for a person suffering from hypermetropia?
a) The image of the close objects is focused behind the retina
b) The focal length of the lens is large
c) The person can see far objects distinctly
d) A concave lens is used to correct this defect
Answer »Answer: (d)
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set 4 Online Quiz
Click to Start..general science mcq CATEGORIES
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» Measurement And SI Units
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» Measuring Devices And Scales
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» Mechanics (Mass, Force, Acceleration, Work, Energy, Momentum, Velocity)
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» Force Of Gravity, Solids And Fluids
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» Motion Under Gravity
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» Physical Properties Of Materials
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» Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations
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» Electric Current And Magnetism
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» Nuclear Physics And Conductivity
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» Modern And Space Physics, Sources Of Energy
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» General Concepts Of Chemistry
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» Nature Of Matter And Composition
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» Atomic Structure Molecules And Nuclear Chemistry
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» Classification Of Elements, Chemical Bonding, Periodicity In Properties & Physical Transformation
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» Metals, Non Metals, Minerals, Ores, Properties, Uses
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» Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases
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» Acids, Bases, Salts And Metals
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» Hydrocarbon, Alcohol, Polymer, Organic Acid And Explosive Substance
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» Fuel, Food Preservation, Nutrition, Medicine, Detergents And Fertilizers
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» Inorganic Chemistry
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» Organic Chemistry
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» Environmental Chemistry
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» Some Important Man Made Materials
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» Sub Divisions Of Biology
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» Genetics, Evolution Of Life & Ecological Biodiversity
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» Taxonomy
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» Heredity
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» Biofertilizer
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» Biological Classification Cell Tissues And Division
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» Human Anatomy
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» Blood Transport System
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» Digestion And Excretion
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» Photosynthesis
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» Vitamins, Nutrition, Health, Disease And Treatment
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» Endocrine Glands, Hormones
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» Physiology Of Plants, Humans And Animals
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» Reproduction
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» Genetic Engineering And Bio Technology
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