Physical Science-1

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Physical Science-1

Instructions for 10th Class Students:

1. Enter Your Name and School Name.
2. 20 Multiple Choice Questions.
3. Each one carries one point.
4. Total 40 Minutes.
5. These Questions Prepared by Sri K. Madhukar
6. Online Test Prepared by Sri P. Srinivas(9492462332).
7. All the Best

Enter Your Full Name : *

Enter Your School Name & Address: *

1. A Concave Mirror forms a point sized image for an object is placed at *

1 point

Focus

Infinity

Beyond C

Centre of Curvature

2. The Mirror used by ENT Specialist is *

1 point

plane mirror

concave mirror

convex mirror

None of these

3. If an object is placed at C on the principal axis infront of a concave mirror, the position of the images is ..... *

1 point

at infinity

between F and C

at C

beyound C

4. The relation between focal length and radius of curvature is given by......... *

1 point

f=2R

f/2=R

f=R/2

f=4R

5. For a concave mirror, the focal length is... *

1 point

positive

negative

zero

none of these

6. We get a vitrual image in a concave mirror when the object is placed........ *

1 point

at F

between the pole and F

beyond C

7. The mirror used by dentists is *

1 point

convex

plane

concave

plane-convex

8. The equeation of mirror formula is ....... *

1 point

1/f = 1/u + 1/v

1/u = 1/f + 1/v

1/v = 1/f + 1/u

f = u + v

9. If an object placed at C of a concave mirror has size 5cm. , then the size of the image........ *

1 point

5cm.

10cm.

2.5cm.

3cm.

10. _____________ is called diverging mirror *

1 point

convex

concave

plane

none of these

11. The Scientist who used mirrors to burn ships was *

1 point

Newton

Fermat

Pascal

Archimedes

12. We get diminished image with covcave mirror when the object is placed......... *

1 point

at F

between the pole and F

at C

beyond C

13. The mirror of ............... shape are more useful in solar cookers. *

1 point

convex

concave

plane

parabolic

14. An object is placed at C of a concave mirror. The distance between image and the pole is ...... *

1 point

equal to f

equal to 2f

between 2f and f

greater than 2f

15. CaO reacts with water to form....... *

1 point

16. This is ........................... reaction. *

1 point

endothermic

photochemical

exothermic

None of these

17. Ammonia is formed by the reaction of gases *

1 point

Hydrogen and Oxygen

Nitrogen and Oxygen

Nitrogen and Hydrogen

Hydrogen and Helium

18. The colour of Methyl Orange indicator in acidic medium is .............. *

1 point

Yellow

Green

Orange

Red

19. A Solution turns red litmus to blue, its pH is likely *

1 point

20. If a base dissolve in water by what name is it better known ? *

1 point

nuetral

base

alkali

acid

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