IMPORTANT QUESTIONS

1. Q181 Which of the following materials cannot be used to make a lens?

   • (a) Water
   • (c) Plastic
   • (b) Glass
   • (d) Clay

   Easy View solution
2. Q182 Where should an object be placed in front of a convex lens to get a real image of the size of the object:

   • (a) At the principal focus of the lens.
   • (b). At twice the focal length.
   • (c) At infinity.
   • (d) Between the optical center of the lens and its principal focus

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3. Q183 Show how would you connect three resistors, each of resistance 6 ohm so that the combination has a resistance of 4Ω.

   Medium View solution
4. Q184 Name the part of neuron through which information travels as an electrical impulse.

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5. Q185 Which sources produce alternating current?

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6. Q186 Why is forest considered a natural ecosystem?

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7. Q187 What is the function of pupil in human eye?

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8. Q188 Which part of a computer is used to point and select an object?

   Easy View solution
9. Q189 Which gas is used to prevent the food item from rancidity?

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10. Q190 List two processes from which it may be concluded that the particles of a gas move continuously Which entity is measured by the movement of the gas particles inside a vessel?

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