1.Light year is the unit of…
            a.intencity of light
            b.distance
            c.time
            d.light
2. Light from the Sun reaches us in nearly
            a.2 minute
            b.12 minute
            c. 8 minute
            d.6 minute
3. The energy possessed by the water collected in the reservoir of a dam

             a.kinetic energy
             b.mechanical energy
             c. electric energy
             d. potential energy
4. Which of the following is most elastic?

           a. Rubber
           b. Glass
           c. Steel
          d.  Plastic

5. Magnetism at the centre of a bar magnet is

            a.Zero
            b.Minimum
            c.Maximum
            d.Minimum or Maximum
6. Sound travels fastest in
   
          a. air
          b. water
          c.vacuum
          d. steel


7. The rear view mirror in a car is
      a.convex
      b. concave
      c. plane
      d. None of these

8. Light travels at the fastest speed in
      a.glass
      b.water
      c.hydrogen
      d.vacuum
9. Capacitor (condenser) is used in an electrical
circuit to
 
      a. step down voltage
      b. step up voltage
      c. store electric charge
      d.  Produce electric charge

10. Optical fibre works on the
       a. principle of refraction
       b. total internal reflection
       c.scattering
       d.  Interference