Physics 10 Unit 12 MCQs Tests

In this post, we have prepared 4 MCQs tests of Federal Board Physics 10 Unit 12 MCQs Tests. For more Class 10 Physics MCQs Tests visit this page.

Physics 10 Unit 12 MCQs Tests

Practice MCQs Test No 1

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435

Class 10 Physics

Chapter 12

Practice MCQs Test No 1

1 / 20

The rough surfaces of object reflect the rays of light in many directions is called

Irregular reflection

Regular reflection

Refraction

Interference

2 / 20

Convex mirror produce images

Equal to object

Larger than object

Smaller than object

Very large in size

3 / 20

In concave mirror the surface is reflecting;

Outer curved

Side of the mirror

Inner curved surface

Outer surface

4 / 20

The angle between the normal and the reflected ray is called angle of

Diffraction

Reflection

Incidence

Refraction

5 / 20

Which statement is incorrect about concave mirror?

Inner surface of spherical mirror is reflecting

Size of image depends upon position of the object

Both virtual and real images can form

Only virtual images are formed

6 / 20

Focal length of spherical mirror is R

R/9

R/3

R/4

R/2

7 / 20

Mirror formula is

[katex] \frac { 1 }{ f } =\frac { 1 }{ p } -\frac { 1 }{ q } [/katex]

[katex] \frac { 1 }{ f } =\frac { 1 }{ q } +\frac { p }{ q } [/katex]

[katex] \frac { 1 }{ f } =\frac { 1 }{ p } -\frac { q }{ p } [/katex]

[katex] \frac { 1 }{ f } =\frac { 1 }{ p } +\frac { 1 }{ q } [/katex]

8 / 20

Regular reflection is reflection by the

Irregular surface

Smooth surface

Smooth and rough surfaces

Rough surface

9 / 20

Plank suggested that light consists of small packets of energy called:

Neutrons

Photons

Electrons

Positrons

10 / 20

The bending of light as it passes from one transparent medium

Reverberation

Reflection

Refraction

Incidence

11 / 20

The incident ray, the normal, and the reflected ray at the point of incidence all lie in the

Opposite direction

Same plane

x and y axis

y & z axis

12 / 20

According to law of reflection

r>i

i=r

i<r

i>r

13 / 20

The distance from the pole to the principal focus measured along the principal axis is

Principal focus

Diameter

Focal length

Radius of curvature

14 / 20

A spherical mirror whose outer curved surface is reflecting is called

Convex lens

Convex mirror

Concave mirror

Concave lens

15 / 20

A line joining centre of curvature and pole of the spherical mirror is

Centre of curvature

Principal focus

Principal axis

Pole

16 / 20

The angle between incident ray and normal N is

Angle of refraction

Angle of reflection

Normal angle

Angle of incidence

17 / 20

Angle of incidence is represented by

i

R

e

p

18 / 20

Which statement is correct about convex mirror?

Outer curved surface is reflecting

All of the given statements are true

Only virtual erect image is formed

Size of image is smaller than object

19 / 20

Vertex is the midpoint of the curved surface of spherical mirror is also called

Radius of curvature

Principal focus

Pole

Principalaxis

20 / 20

The relationship between object distance p, image distance q focal length of the mirror is called;

Lens formula

Mirror focal length

Mirror formula

Distance from mirror

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Practice MCQs Test No 2

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267

Class 10 Physics

Chapter 12

Practice MCQs Test No 2

1 / 20

When a ray of light enters from a denser medium to a rarer medium

It bends away from the normal

It bends toward the normal

It bends towards inside

None of these

2 / 20

It is a transparent body (made of optical glass) with at least two polished plane faces inclined towards each other from which light is refracted;

Camera

Mirror

Lens

Prism

3 / 20

The speed of light is greater in

Solid

Air

Glass

Water

4 / 20

In lens number of curved surfaces at least;

Two

One

Three

Four

5 / 20

The line passing through the two centres of curvatures of the lens is called

Principal axis

Focal length

Optical centre

Principal focus

6 / 20

\( \frac { sin\quad i }{ sin\quad r } =\quad n\quad =\quad \frac { { n }_{ 2 } }{ { n }_{ 1 } }  \) is called

Boyl’s law

Newton's law

Snell's law

Charless's law

7 / 20

According to law of refraction

[katex] \frac { sin\quad i }{ sin\quad r } =\quad constant [/katex]

[katex] \frac { sin\quad i }{ sin\quad r } >\quad n [/katex]

[katex] \frac { sin\quad i }{ sin\quad r } >\quad r [/katex]

[katex] \frac { sin\quad i }{ sin\quad r } >\quad i [/katex]

8 / 20

Speed of light in air is approximately

3 x 10⁷ ms⁻¹

3.0 x 10⁸ ms⁻¹

4 x 10¹⁴ ms⁻¹

4 x 10⁹ ms⁻¹

9 / 20

The lens which causes incident parallel rays to converge at a point is;

Converging lens

Concave lens

Convex lens

Both Convex and converging lense

10 / 20

Lenses are used in optical devices;

All of these

Eye glasses

Camera

Microscope

11 / 20

Lens thick at the centre but thin at the edges is;

Convex

Concave

Diverging

Plane

12 / 20

For a concave lens, the parallel rays appear to come from a point behind the lens is called

Focal length

Principal focus

Principal axis

Optical length

13 / 20

SI unit of power of lens is:

Diopter

Millimeter

Meter

Centimeter

14 / 20

No refraction occurs when the angle of incidence is

Larger than the critical angle

Equal to the critical angle

Very small than the critical angle

Smaller than the critical angle

15 / 20

The distance between the optical centre and the principal focus is.

Principal axis

Focal length

Principal focus

Optical length

16 / 20

The speed of light in water is approximately

2.3 x 10⁸ ms⁻¹

3 x 10⁸ ms⁻¹

3 x 10⁷ ms⁻¹

2.0 x 10⁸ ms⁻¹

17 / 20

\( \frac { speed\quad of\quad light\quad in\quad vacuum }{ speed\quad of\quad light\quad in\quad medium } =\quad ? \)

Reflective index

Critical angle

Snell's law

Refractive index

18 / 20

The angle of incidence that causes the refracted ray in the rarer medium to bend through 99ᵒ is called

Angle of incidence

Angle of refraction

Angle of reflection

Critical angle

19 / 20

1 D =?

1 m⁻²

1 m⁻³

1 cm⁻¹

1 m⁻¹

20 / 20

Optical centre is represented by

C

f

A

F

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Practice MCQs Test No 3

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199

Class 10 Physics

Chapter 12

Practice MCQs Test No 3

1 / 20

In case of photograph enlarger the object is placed at distance;

Less than 2F

More than F

Both more than F and less than 2F

More than 3F

2 / 20

If the object is on the right side of the lens then p is;

Negative

Positive

Larger

Smaller

3 / 20

Lens formula is

1/f=1/p-1/q

1/p=1/f+1/q

1/f=q/p+1/q

1/f=1/p+1/q

4 / 20

Which statement is correct about image formed by camera?

Diminished image is formed

Real image is formed

Inverted image is formed

All of these

5 / 20

It has positive focal length;

Convex lens

Concave lens

None of above

Simple lens

6 / 20

The image with convex lens is formed at 2F, real, Inverted, the same size as the object when the object is placed at:

C

2F

F

Between F and 2F

7 / 20

It is used to explore the interior organs of the body?

Microscope

Telescope

Endoscope

Projector

8 / 20

Endoscope used to diagnose the stomach is;

Pancreoscope

Bronchoscope

Gastroscope

Cystoscope

9 / 20

The study of behavior of light is called;

Geometry

Geometrical optics

Optics

Plasma

10 / 20

In mirrors images are formed through reflection, but lenses form images through;

Refraction

Incidence

Reflection

Diffraction

11 / 20

Endoscope which is used to diagnose throat is;

Gastroscope

Cystoscope

None of these

Bronschoscope

12 / 20

Optical device is;

Photograph enlarger

Slide projector

Camera

All of these

13 / 20

Which pipe is a bundle of thousands of optical fibers bounded together?

Telescope

Projector

Microscope

lightpipe

14 / 20

For a converging lens f is;

Smeller

Sometime negative and sometime positive

Negative

Positive

15 / 20

For seeing tiny objects we use microscope of;

High resolving power

Low resolving power

Electron microscope

Light microscope

16 / 20

In case of convex lens when object is placed beyond 2F, the Image is formed;

Smaller than object

Between F and 2F

All of these

Real, inverted

17 / 20

A magnifying glass is a convex lens which is used to produce magnified images of small objects. It is also called;

Light microscope

Compound microscope

Simple microscope

Electron microscope

18 / 20

The working principle of photograph enlarger is the same as;

Telescope

Camera

Slide projector

Endoscope

19 / 20

When object is at F the image is;

Not formed

Real

Small

Inverted

20 / 20

Which statement is correct about compound microscope?

Focal length of objective lens is smaller than eye piece.

It is used to see very small object

Distance between objective lens and eye piece is greater than fₒ+fₑ.

All given statements are true.

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Practice MCQs Test No 4

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198

Class 10 Physics

Chapter 12

Practice MCQs Test No 4

1 / 17

It is an optical instrument which is used to observe distant objects using lens or mirror;

Light microscope

microscope

Kaledoscope

Telescope

2 / 17

Power of concave lens is:

Greater

Negative

Positive

Less

3 / 17

Have ability to move eye lens forward or backward.

Birds

Dog

Human

Fish

4 / 17

Human eye acts like;

Kaledoscope

Microscope

Camera

Telescope

5 / 17

The disability of the eye to form distinct images of nearby object on retina is called forsightedness or:

Short sightedness

isometropia

Myopia

hypermetropia

6 / 17

The coloured portion of eye controls the amount of light reaching the retina.

Eye lens

Pupil

Iris

Cornea

7 / 17

Magnification of telescope can be determined by using formula;

M=F/L

M=Lₒ/fₒ

M=fₒ/fₒ

M=fₒ/fₑ

8 / 17

The nearsighted eye can be corrected by using;

Concave mirror

Diverging lens

Converging lens

Both converging and diverging lenses

9 / 17

Short sighted may be due to eyeball being

Too short

Too thick

Too thin

Too long

10 / 17

Farsightedness is corrected by using;

Concave mirror

Convex mirror

Diverging lens

Converging lens

11 / 17

Near point of a normal human being is:

100cm

25cm

Infinity

50cm

12 / 17

Long sightedness is caused due to ________ eye ball:

Both thick and small

small

Thick

Thin

13 / 17

The magnification of compound microscope is;

M=L/fₑ(1+d/fₑ)

M=L/fₒ(1+d/fₑ)

M=(1+d/fₑ)

M=L/fₒ

14 / 17

The variation of focal length of eye lens is called;

Variation

Accommodation

Magnification

Resolution

15 / 17

When people cannot see distant objects dearly without the aid of spectacles the defect of vision is;

near-sightedness

Far sightedness

Both Short-sighted and near-sightedness

Short-sighted

16 / 17

Long sightedness is removed by:

Convex mirror

Convex lens

Concave mirror

Concave lens

17 / 17

Light enters the eye through transparent membrane called;

Pupil

Retina

Iris

Cornea

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