Free Printable Physics 14-08-2020

1.

The distance between optic center and focus is called __

a)

Focus

b)

Focal length

c)

Optic center

d)

None

2.

The mid point of thin lens called _________

a)

Focus

b)

Optic center (or) Pole

c)

Centre of curvature

d)

None

3.

Which of the following is lens formula

a)

\frac{1}{f}=\frac{1}{v}

b)

$\frac{1}{f}=\frac{1}{4}=\frac{1}{v}$

c)

$\frac{1}{f}=\frac{1}{v}-\frac{1}{u}$

d)

$\frac{1}{f}=\frac{1}{4}$

4.

\frac{1}{f}=\left(n-1\right)\left(\frac{1}{R_1}-\frac{1}{R_2}\right)\ is\ knowon\ as\ _{\ldots\ldots\ldots\ldots\ldots}formula

a)

Lens

b)

Len's maker

c)

cured mirror

d)

None

5.

The image that formed on the screen is called ____

a)

Virtual image

b)

real image

c)

Plane

d)

None

6.

_______ Images cannot be formed on screen

a)

Virtual

b)

real

c)

Plane

d)

None

7.

If position of object is at infinity in front of convex lens image is formed at __________

a)

C

b)

F

c)

Infinity

d)

None

8.

Image is formed at ‘C’ for convex lens then position of object is ________

a)

F

b)

C

c)

P

d)

None

9.

Position of object is between pole and focus _______ type image will form

a)

Real

b)

Virtual

c)

Plane

d)

None

10.

Magnified and real Image will capture for position of object for convex lens is ________

a)

Between F&C

b)

At F

c)

At c

d)

Beyond c

11.

_________ type of images will form for concave lens.

a)

Real

b)

virtual

c)

plane

d)

none

12.

Bi convex lens is also called as _______

a)

divergent lens

b)

convergent lens

c)

parallel lens

d)

none

13.

Bi concave lens is also called as __________

a)

divergent lens

b)

parallel bean lens

c)

convergent lens

d)

none

14.

Two bulged out surfaces can form ________ lens

a)

Bi concave

b)

$\theta\ convex$

c)

Plano convex

d)

Plano concave

15.

Bi convex lens is ________ at middle

a)

Thin

b)

thick

c)

Normal

d)

None

16.

Bi convex lens is __________ at edges

a)

Thick

b)

Thin

c)

Normal

d)

None

17.

when a ray is passing through _______ can’t deviate

a)

Principal axis

b)

focus

c)

Centre of curvature

d)

infinity

18.

If a ray through optic center ________

a)

Undeviate

b)

deviate

c)

deviate through-F

d)

None

19.

The rays passing parallel to the principal axis ______ at focus(concave lens)

a)

Diverge

b)

converge

c)

refract

d)

none

20.

The rays passing parallel to the principal axis for a convex lens appear to diverge at _________

a)

Focus

b)

Centre

c)

pole

d)

none

21.

The distance between Centre of curvature and curved surface is called _______

a)

Pole

b)

focus

c)

radius of curvature

d)

None

22.

Radius of curvature is denoted by _________

a)

P

b)

F

c)

R

d)

none

23.

Which of the following is curved surface formula.

a)

\frac{n^2}{v}-\frac{n^1}{4}

b)

$\frac{n^2}{v}-\frac{n^1}{4}=n^2-n^1$

c)

$\frac{n_2}{v}-\frac{n_1}{u}=\frac{n_2-n_1}{R}$

d)

$\frac{n^2}{v}=\frac{n^1}{4}$

24.

Air bubble in water behaves like a _________ lens

a)

diverging lens

b)

converging lens

c)

Refracting

d)

none

25.

Image formed by concave lens is ________

a)

real

b)

diminished

c)

inverted

d)

none

Physics 14-08-2020

Total questions: 25

Worksheet time: 25mins

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