electric current and magnetism - Category wise Question and Answer Practice Test with Solutions
electric current and magnetism PRACTICE TEST [9 - EXERCISES]
set 1
set 2
set 3
set 4
set 5
set 6
set 7
set 8
set 9
Question : 26 [NDA]
Two pieces of conductor of same material and of equal length are connected in series with a cell. One of the two pieces has cross-sectional area double that of the other. Which one of the following statements is correct in this regard ?
a) Same amount of electric current would pass through both the pieces producing more heat in the thicker one.
b) The thicker one will allow stronger current to pass through it.
c) The thinner one would allow stronger current to pass through it.
d) Same amount of electric current would pass through both the pieces producing more heat in the thinner one.
Answer »Answer: (d)
Question : 27
The charge given to any conductor resides on its outer surface, because
a) the free charge tends to be in its minimum kinetic energy state
b) the free charge tends to be in its maximum potential energy state.
c) the free charge tends to be in its minimum potential energy state
d) the free charge tends to be in its maximum kinetic energy state
Answer »Answer: (c)
Question : 30
In an A.C. circuit with voltage V and current I the power dissipated is
a) $1/2$VI
b) V I
c) $1/√2$VI
d) dependent on the phase between V and I
Answer »Answer: (d)
Power dissipated = $E_{rms}. I_{rms} = (E_{rms}) (I_{rms})$cosϴ
Hence, power dissipated depends upon phase difference.
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set 6 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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