IMPORTANT QUESTIONS

1. Q101 The resistance of a conductor does not depend on its

   • (a) Temperature
   • (b) Length
   • (c) Thickness
   • (d) Shape

   Easy View solution
2. Q102 Deduce the expression for the electrical energy spent in flow of current through a conductor.

   Hard View solution
3. Q103 What is the unit to measure sound intensity?

   Medium View solution
4. Q104 Two coils A and B are placed close to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give a reason.

   Medium View solution
5. Q105 Give two examples of autotrophs. Why do you call them so?

   Medium View solution
6. Q106 Give any two examples of water pollutants.

   Medium View solution
7. Q107 Name the carboxylic acids found in lemon.

   Easy View solution
8. Q108 A teacher obtains a distinct image of a distant tree on a screen with the help of a convex lens and then asks her four students A, B, C, D to describe nature and size of image. Correct answer was given by (a) A (b) B (c) C (d) D

   • (A) virtual, inverted, smaller than object
   • (B) real, inverted, smaller than object
   • (C) virtual, erect, same size as that of object
   • (D) real, erect, same size as that of object

   Easy View solution
9. Q109 The number of atoms in 1 mole of oxygen molecule.

   Easy View solution
10. Q110 When a gun is fired it exerts a forward force on the bullet and the bullet exerts an equal opposite backward force on the gun. Why? Explain the law which is applicable in this case.

    Medium View solution