Multiple Choice Question on Basic Concept of Science Class XI-XII Standard Practice Test 8
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This is a mock drill question bank on Basic Concept of Science of Class XI and XII standard. The question bank consists of 10 questions with clock set for 10 minutes. After you finish the test, press Quiz Finish and you will get the answer sheet, your result and its comparison with others. You will also be given remarks containing the explanation about the answer and also about the distracters (other options) to build confidence on the subject.
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The Answer Key:
Sr No Question Answer Remarks 1 Suggest way to shield a sensitive measuring instrument from a strong electrostatic field environment. provide a metallic conducting enclosure around it By providing a conducting material screen, the field inside become zero 2 How the resistivity of alloys as compared to parent metals? increases The mobility of charge particle reduces with alloying of material 3 When two thin lenses joins together, the focal length of the lenses combination will be given as 1/F=1/f₁+1/f₂ Diopter scale was adopted for opthalmologist as it simply adds the diapoter of one lense with that of another. The inverse of focal length is taken as Diapoter otherwise this question has no significance. 4 The ratio of Cp and Cv for a dia-atomic gas is five/three Cp/Cv=ϒ=f+2/f where f is 3,5, etc for monatomic and dia-atomic gas. 5 A capacitor is made consisting of two dielectric of thickness t₁ & t₂ and dielectric constant of K₁ & K₂. What will be its equivalent dielectric constant? ε₀*A/[ t₁/K₁ + t₂/K₂] C=ε₀*A/t; here the thickness will now become t₁+ t₂ if the dielectric constant is same. Now the effective thickness will now become t₁/K₁ + t₂/K₂ and effective capacitance will become C=ε₀*A/[ t₁/K₁ + t₂/K₂] 6 A battery of internal resistance e and emf of E supplies power to resistance R. The current drawn is maximum when R=0 The maximum current will be when the resistance is minimum as inernal resistance is fixed and cannot be zero, it will be maximum when R is zero. 7 Why does the sun looks red at the time of sunset? the light from sun encounter large atmosphere where the blue light is scattering more leaving mostly red light to travel The light which scatters is not visible and red light having minimum scattering will be more prominently visible. 8 The gas equation of an ideal gas is PV=µRT Gas equation is very standard equation PV=nRT; and demonstrate all relations with the variables in any thermodynamic system. 9 Glittering of diamond is due to to total internal reflection of light Absorption, reflaction and dispersion has different property. 10 Two incandescent bulbs of 100 and 200 W are connected in series by a Voltage source of V. Which bulb will glow brightly? 100 W When connected in series, the net power is given by 1/P=1/P₁+1/P₂; and therefore, higher power lamp will have less contribution. Sine i is same, hence P is in proportion to the resistance. For higher wattage, R is small. -
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Question 1 of 10
1. Question
Glittering of diamond is due to
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Question 2 of 10
2. Question
Suggest way to shield a sensitive measuring instrument from a strong electrostatic field environment.
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Question 3 of 10
3. Question
How the resistivity of alloys as compared to parent metals?
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Question 4 of 10
4. Question
When two thin lenses joins together, the focal length of the lenses combination will be given as
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Question 5 of 10
5. Question
The ratio of Cp and Cv for a dia-atomic gas is
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Question 6 of 10
6. Question
A capacitor is made consisting of two dielectric of thickness t₁ & t₂ and dielectric constant of K₁ & K₂. What will be its equivalent dielectric constant?
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Question 7 of 10
7. Question
A battery of internal resistance e and emf of E supplies power to resistance R. The current drawn is maximum when
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Question 8 of 10
8. Question
Why does the sun looks red at the time of sunset?
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Question 9 of 10
9. Question
The gas equation of an ideal gas is
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Question 10 of 10
10. Question
Two incandescent bulbs of 100 and 200 W are connected in series by a Voltage source of V. Which bulb will glow brightly?
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