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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374

Class 10 Physics

Chapter 12

Practice MCQs Test No 1

1 / 20

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

Same plane

Opposite direction

x and y axis

y & z axis

2 / 20

Angle of incidence is represented by

R

e

i

p

3 / 20

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

Positrons

Neutrons

Electrons

Photons

4 / 20

Which statement is correct about convex mirror?

Outer curved surface is reflecting

Size of image is smaller than object

All of the given statements are true

Only virtual erect image is formed

5 / 20

Convex mirror produce images

Smaller than object

Equal to object

Very large in size

Larger than object

6 / 20

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

Refraction

Reflection

Incidence

Diffraction

7 / 20

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

Principal axis

Principal focus

Centre of curvature

Pole

8 / 20

The bending of light as it passes from one transparent medium

Reflection

Refraction

Reverberation

Incidence

9 / 20

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

Principal focus

Diameter

Focal length

Radius of curvature

10 / 20

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

Pole

Principalaxis

Radius of curvature

Principal focus

11 / 20

The angle between incident ray and normal N is

Angle of refraction

Angle of incidence

Angle of reflection

Normal angle

12 / 20

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

Interference

Irregular reflection

Regular reflection

Refraction

13 / 20

Regular reflection is reflection by the

Smooth and rough surfaces

Smooth surface

Rough surface

Irregular surface

14 / 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

15 / 20

Focal length of spherical mirror is R

R/9

R/3

R/2

R/4

16 / 20

According to law of reflection

r>i

i=r

i<r

i>r

17 / 20

A spherical mirror whose outer curved surface is reflecting is called

Concave mirror

Convex mirror

Convex lens

Concave lens

18 / 20

Mirror formula is

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

[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 }{ q } +\frac { p }{ q } [/katex]

19 / 20

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

Mirror formula

Lens formula

Mirror focal length

Distance from mirror

20 / 20

In concave mirror the surface is reflecting;

Inner curved surface

Outer surface

Side of the mirror

Outer curved

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Practice MCQs Test No 2

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244

Class 10 Physics

Chapter 12

Practice MCQs Test No 2

1 / 20

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

Optical centre

Principal focus

Focal length

Principal axis

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;

Lens

Camera

Prism

Mirror

3 / 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

4 / 20

The speed of light in water is approximately

3 x 10⁷ ms⁻¹

3 x 10⁸ ms⁻¹

2.0 x 10⁸ ms⁻¹

2.3 x 10⁸ ms⁻¹

5 / 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

Reflective index

Snell's law

6 / 20

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

Principal axis

Optical length

Principal focus

Focal length

7 / 20

The speed of light is greater in

Solid

Air

Glass

Water

8 / 20

1 D =?

1 m⁻³

1 m⁻²

1 m⁻¹

1 cm⁻¹

9 / 20

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

Convex lens

Converging lens

Concave lens

Both Convex and converging lense

10 / 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 i [/katex]

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

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

11 / 20

Optical centre is represented by

C

A

F

f

12 / 20

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

Convex

Concave

Plane

Diverging

13 / 20

In lens number of curved surfaces at least;

Four

Three

One

Two

14 / 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

Newton's law

Boyl’s law

15 / 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

16 / 20

Speed of light in air is approximately

4 x 10¹⁴ ms⁻¹

4 x 10⁹ ms⁻¹

3.0 x 10⁸ ms⁻¹

3 x 10⁷ ms⁻¹

17 / 20

SI unit of power of lens is:

Centimeter

Meter

Millimeter

Diopter

18 / 20

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

Optical length

Principal focus

Principal axis

Focal length

19 / 20

Lenses are used in optical devices;

Microscope

Eye glasses

All of these

Camera

20 / 20

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

Critical angle

Angle of reflection

Angle of incidence

Angle of refraction

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Practice MCQs Test No 3

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189

Class 10 Physics

Chapter 12

Practice MCQs Test No 3

1 / 20

The study of behavior of light is called;

Geometry

Geometrical optics

Optics

Plasma

2 / 20

For a converging lens f is;

Sometime negative and sometime positive

Positive

Negative

Smeller

3 / 20

Endoscope which is used to diagnose throat is;

Cystoscope

Gastroscope

Bronschoscope

None of these

4 / 20

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

Light microscope

Electron microscope

Simple microscope

Compound microscope

5 / 20

Optical device is;

Slide projector

All of these

Camera

Photograph enlarger

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:

Between F and 2F

F

2F

C

7 / 20

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

Microscope

lightpipe

Projector

Telescope

8 / 20

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

Incidence

Reflection

Refraction

Diffraction

9 / 20

When object is at F the image is;

Small

Real

Inverted

Not formed

10 / 20

The working principle of photograph enlarger is the same as;

Telescope

Slide projector

Endoscope

Camera

11 / 20

Endoscope used to diagnose the stomach is;

Gastroscope

Pancreoscope

Cystoscope

Bronchoscope

12 / 20

For seeing tiny objects we use microscope of;

Low resolving power

High resolving power

Electron microscope

Light microscope

13 / 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

14 / 20

Which statement is correct about compound microscope?

It is used to see very small object

All given statements are true.

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

Focal length of objective lens is smaller than eye piece.

15 / 20

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

Endoscope

Projector

Telescope

Microscope

16 / 20

It has positive focal length;

None of above

Simple lens

Convex lens

Concave lens

17 / 20

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

Smaller

Positive

Larger

Negative

18 / 20

Lens formula is

1/f=1/p+1/q

1/f=q/p+1/q

1/p=1/f+1/q

1/f=1/p-1/q

19 / 20

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

Less than 2F

More than 3F

More than F

Both more than F and less than 2F

20 / 20

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

Between F and 2F

Smaller than object

All of these

Real, inverted

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Practice MCQs Test No 4

/17

188

Class 10 Physics

Chapter 12

Practice MCQs Test No 4

1 / 17

Magnification of telescope can be determined by using formula;

M=fₒ/fₑ

M=fₒ/fₒ

M=F/L

M=Lₒ/fₒ

2 / 17

Human eye acts like;

Kaledoscope

Microscope

Camera

Telescope

3 / 17

Power of concave lens is:

Negative

Positive

Greater

Less

4 / 17

The variation of focal length of eye lens is called;

Accommodation

Resolution

Variation

Magnification

5 / 17

The magnification of compound microscope is;

M=L/fₒ(1+d/fₑ)

M=L/fₑ(1+d/fₑ)

M=L/fₒ

M=(1+d/fₑ)

6 / 17

The nearsighted eye can be corrected by using;

Concave mirror

Both converging and diverging lenses

Converging lens

Diverging lens

7 / 17

Farsightedness is corrected by using;

Convex mirror

Converging lens

Concave mirror

Diverging lens

8 / 17

Near point of a normal human being is:

100cm

50cm

25cm

Infinity

9 / 17

Long sightedness is caused due to ________ eye ball:

Both thick and small

Thin

Thick

small

10 / 17

Have ability to move eye lens forward or backward.

Fish

Birds

Dog

Human

11 / 17

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

Short sightedness

Myopia

hypermetropia

isometropia

12 / 17

Short sighted may be due to eyeball being

Too long

Too thin

Too thick

Too short

13 / 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

14 / 17

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

Light microscope

Kaledoscope

microscope

Telescope

15 / 17

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

Pupil

Eye lens

Cornea

Iris

16 / 17

Long sightedness is removed by:

Convex mirror

Concave mirror

Convex lens

Concave lens

17 / 17

Light enters the eye through transparent membrane called;

Cornea

Iris

Pupil

Retina

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