Answer the following questions: Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or decrease?

Answer the following questions: Why does the reverse current show a sudden increase at the critical voltage?

Show that apparent depth of a water tank is less than real depth.

Answer the following questions: The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?

Answer the following questions: Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?

Answer the following questions: In a single slit diffraction experiment, the width of the slit is made double the original width. How does this affect the size and intensity of the central diffraction band?

Answer the following questions : A man with a wristwatch on his hand falls from the top of a tower. Does the watch give correct time during the free fall ?

Answer the following questions: The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?

Answer the following questions: A diver under water, looks obliquely at a fisherman standing on the bank of a lake. Would the fisherman look taller or shorter tothe diver than what he actually is?