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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172

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

Regular reflection

Interference

Irregular reflection

Refraction

2 / 20

Regular reflection is reflection by the

Smooth and rough surfaces

Smooth surface

Irregular surface

Rough surface

3 / 20

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

Principal axis

Principal focus

Centre of curvature

Pole

4 / 20

Which statement is correct about convex mirror?

Only virtual erect image is formed

Size of image is smaller than object

All of the given statements are true

Outer curved surface is reflecting

5 / 20

A spherical mirror whose outer curved surface is reflecting is called

Concave mirror

Concave lens

Convex mirror

Convex lens

6 / 20

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

Mirror focal length

Distance from mirror

Lens formula

Mirror formula

7 / 20

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

Pole

Principal focus

Radius of curvature

Principalaxis

8 / 20

Angle of incidence is represented by

e

R

i

p

9 / 20

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

Refraction

Incidence

Reflection

Diffraction

10 / 20

According to law of reflection

i>r

i<r

i=r

r>i

11 / 20

In concave mirror the surface is reflecting;

Side of the mirror

Outer curved

Outer surface

Inner curved surface

12 / 20

Focal length of spherical mirror is R

R/3

R/9

R/4

R/2

13 / 20

Convex mirror produce images

Equal to object

Smaller than object

Larger than object

Very large in size

14 / 20

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

Same plane

x and y axis

Opposite direction

y & z axis

15 / 20

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

Electrons

Neutrons

Positrons

Photons

16 / 20

Mirror formula is

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

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

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

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

17 / 20

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

Focal length

Radius of curvature

Principal focus

Diameter

18 / 20

The angle between incident ray and normal N is

Angle of refraction

Normal angle

Angle of incidence

Angle of reflection

19 / 20

The bending of light as it passes from one transparent medium

Reflection

Incidence

Reverberation

Refraction

20 / 20

Which statement is incorrect about concave mirror?

Both virtual and real images can form

Size of image depends upon position of the object

Inner surface of spherical mirror is reflecting

Only virtual images are formed

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Practice MCQs Test No 2

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102

Class 10 Physics

Chapter 12

Practice MCQs Test No 2

1 / 20

According to law of refraction

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

[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 i [/katex]

2 / 20

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

Principal focus

Optical length

Focal length

Principal axis

3 / 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 reflection

Critical angle

Angle of refraction

4 / 20

No refraction occurs when the angle of incidence is

Larger than the critical angle

Very small than the critical angle

Smaller than the critical angle

Equal to the critical angle

5 / 20

The speed of light in water is approximately

2.0 x 10⁸ ms⁻¹

3 x 10⁸ ms⁻¹

3 x 10⁷ ms⁻¹

2.3 x 10⁸ ms⁻¹

6 / 20

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

None of these

It bends toward the normal

It bends away from the normal

It bends towards inside

7 / 20

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

Charless's law

Snell's law

Boyl’s law

Newton's law

8 / 20

1 D =?

1 m⁻²

1 m⁻³

1 m⁻¹

1 cm⁻¹

9 / 20

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

Refractive index

Critical angle

Snell's law

Reflective index

10 / 20

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

Principal axis

Focal length

Optical length

Principal focus

11 / 20

In lens number of curved surfaces at least;

Four

One

Two

Three

12 / 20

Optical centre is represented by

F

C

f

A

13 / 20

Speed of light in air is approximately

3.0 x 10⁸ ms⁻¹

3 x 10⁷ ms⁻¹

4 x 10¹⁴ ms⁻¹

4 x 10⁹ ms⁻¹

14 / 20

The speed of light is greater in

Water

Solid

Air

Glass

15 / 20

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

Concave lens

Converging lens

Convex lens

Both Convex and converging lense

16 / 20

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

Diverging

Convex

Plane

Concave

17 / 20

SI unit of power of lens is:

Meter

Diopter

Millimeter

Centimeter

18 / 20

Lenses are used in optical devices;

Eye glasses

Microscope

Camera

All of these

19 / 20

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

Principal focus

Optical centre

Focal length

Principal axis

20 / 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;

Prism

Mirror

Lens

Camera

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Practice MCQs Test No 3

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74

Class 10 Physics

Chapter 12

Practice MCQs Test No 3

1 / 20

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

More than 3F

Both more than F and less than 2F

Less than 2F

More than F

2 / 20

It has positive focal length;

Concave lens

Convex lens

Simple lens

None of above

3 / 20

The study of behavior of light is called;

Geometry

Optics

Plasma

Geometrical optics

4 / 20

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

Compound microscope

Electron microscope

Simple microscope

Light microscope

5 / 20

The working principle of photograph enlarger is the same as;

Camera

Telescope

Endoscope

Slide projector

6 / 20

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

Smaller

Negative

Larger

Positive

7 / 20

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

Between F and 2F

C

F

2F

8 / 20

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

Microscope

Telescope

lightpipe

Projector

9 / 20

Optical device is;

Photograph enlarger

Camera

Slide projector

All of these

10 / 20

Lens formula is

1/f=q/p+1/q

1/f=1/p-1/q

1/p=1/f+1/q

1/f=1/p+1/q

11 / 20

For a converging lens f is;

Positive

Negative

Smeller

Sometime negative and sometime positive

12 / 20

Endoscope used to diagnose the stomach is;

Cystoscope

Bronchoscope

Pancreoscope

Gastroscope

13 / 20

Endoscope which is used to diagnose throat is;

None of these

Gastroscope

Bronschoscope

Cystoscope

14 / 20

Which statement is correct about compound microscope?

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

Focal length of objective lens is smaller than eye piece.

It is used to see very small object

All given statements are true.

15 / 20

When object is at F the image is;

Not formed

Real

Small

Inverted

16 / 20

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

Projector

Microscope

Endoscope

Telescope

17 / 20

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

Refraction

Reflection

Incidence

Diffraction

18 / 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

19 / 20

Which statement is correct about image formed by camera?

Inverted image is formed

Real image is formed

Diminished image is formed

All of these

20 / 20

For seeing tiny objects we use microscope of;

Low resolving power

Electron microscope

High resolving power

Light microscope

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Practice MCQs Test No 4

/17

81

Class 10 Physics

Chapter 12

Practice MCQs Test No 4

1 / 17

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

Far sightedness

Short-sighted

Both Short-sighted and near-sightedness

near-sightedness

2 / 17

Have ability to move eye lens forward or backward.

Human

Dog

Birds

Fish

3 / 17

Long sightedness is caused due to ________ eye ball:

Thin

Both thick and small

small

Thick

4 / 17

The variation of focal length of eye lens is called;

Magnification

Resolution

Accommodation

Variation

5 / 17

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

microscope

Kaledoscope

Light microscope

Telescope

6 / 17

Light enters the eye through transparent membrane called;

Retina

Pupil

Cornea

Iris

7 / 17

Near point of a normal human being is:

50cm

100cm

25cm

Infinity

8 / 17

The magnification of compound microscope is;

M=L/fₒ(1+d/fₑ)

M=(1+d/fₑ)

M=L/fₑ(1+d/fₑ)

M=L/fₒ

9 / 17

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

Eye lens

Iris

Cornea

Pupil

10 / 17

Magnification of telescope can be determined by using formula;

M=Lₒ/fₒ

M=fₒ/fₒ

M=fₒ/fₑ

M=F/L

11 / 17

Power of concave lens is:

Positive

Greater

Negative

Less

12 / 17

Human eye acts like;

Camera

Telescope

Kaledoscope

Microscope

13 / 17

Long sightedness is removed by:

Concave lens

Convex lens

Concave mirror

Convex mirror

14 / 17

The nearsighted eye can be corrected by using;

Converging lens

Diverging lens

Both converging and diverging lenses

Concave mirror

15 / 17

Farsightedness is corrected by using;

Concave mirror

Convex mirror

Converging lens

Diverging lens

16 / 17

Short sighted may be due to eyeball being

Too thin

Too thick

Too short

Too long

17 / 17

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

Short sightedness

Myopia

hypermetropia

isometropia

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