2. Which instrument is used to measure depth of ocean ?
3. Name of the instrument to measure atomspheric pressure ?
4. Which instrument is used to measure the power of electric circuit ?
5. Which instrument is used in submarine to see the objects above sea level ?
6. Which instrument is used to measure curvature of spherical objects ?
7. Which instrument is used to record physical happenings at a distant place ?
8. Which instrument is used to measure the scattering of light by particles suspended in a liquid ?
9. Which instrument is used to determine the intensity of colours ?
ANSWER KEY: 1- (c), 2- (d), 3- (a), 4- (b), 5- (d), 6- (b), 7- (c), 8- (a),9- (c), 10- (b).