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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523

Class 10 Physics

Chapter 12

Practice MCQs Test No 1

1 / 20

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

Neutrons

Positrons

Photons

Electrons

2 / 20

Convex mirror produce images

Equal to object

Very large in size

Smaller than object

Larger than object

3 / 20

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

Principal axis

Pole

Principal focus

Centre of curvature

4 / 20

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

x and y axis

Opposite direction

y & z axis

Same plane

5 / 20

Which statement is incorrect about concave mirror?

Both virtual and real images can form

Inner surface of spherical mirror is reflecting

Only virtual images are formed

Size of image depends upon position of the object

6 / 20

A spherical mirror whose outer curved surface is reflecting is called

Concave lens

Convex lens

Concave mirror

Convex mirror

7 / 20

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

Reflection

Diffraction

Incidence

Refraction

8 / 20

Regular reflection is reflection by the

Smooth surface

Smooth and rough surfaces

Irregular surface

Rough surface

9 / 20

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

Refraction

Irregular reflection

Interference

Regular reflection

10 / 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]

11 / 20

Angle of incidence is represented by

e

i

R

p

12 / 20

The bending of light as it passes from one transparent medium

Refraction

Incidence

Reflection

Reverberation

13 / 20

Which statement is correct about convex mirror?

Outer curved surface is reflecting

All of the given statements are true

Size of image is smaller than object

Only virtual erect image is formed

14 / 20

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

Pole

Principal focus

Radius of curvature

Principalaxis

15 / 20

The angle between incident ray and normal N is

Angle of refraction

Normal angle

Angle of reflection

Angle of incidence

16 / 20

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

Focal length

Diameter

Principal focus

Radius of curvature

17 / 20

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

Distance from mirror

Mirror formula

Lens formula

Mirror focal length

18 / 20

In concave mirror the surface is reflecting;

Outer curved

Outer surface

Inner curved surface

Side of the mirror

19 / 20

According to law of reflection

i>r

i=r

i<r

r>i

20 / 20

Focal length of spherical mirror is R

R/9

R/3

R/2

R/4

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Practice MCQs Test No 2

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342

Class 10 Physics

Chapter 12

Practice MCQs Test No 2

1 / 20

In lens number of curved surfaces at least;

Three

Four

One

Two

2 / 20

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

It bends toward the normal

It bends towards inside

None of these

It bends away from the normal

3 / 20

The speed of light is greater in

Solid

Glass

Water

Air

4 / 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 i [/katex]

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

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

5 / 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

6 / 20

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

Concave

Convex

Diverging

Plane

7 / 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

Prism

Camera

Mirror

8 / 20

No refraction occurs when the angle of incidence is

Smaller than the critical angle

Equal to the critical angle

Very small than the critical angle

Larger than the critical angle

9 / 20

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

Both Convex and converging lense

Concave lens

Converging lens

Convex lens

10 / 20

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

Critical angle

Angle of incidence

Angle of refraction

Angle of reflection

11 / 20

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

Principal focus

Focal length

Optical length

Principal axis

12 / 20

The speed of light in water is approximately

2.0 x 10⁸ ms⁻¹

2.3 x 10⁸ ms⁻¹

3 x 10⁷ ms⁻¹

3 x 10⁸ ms⁻¹

13 / 20

Speed of light in air is approximately

4 x 10⁹ ms⁻¹

3 x 10⁷ ms⁻¹

4 x 10¹⁴ ms⁻¹

3.0 x 10⁸ ms⁻¹

14 / 20

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

Principal axis

Principal focus

Optical length

Focal length

15 / 20

1 D =?

1 cm⁻¹

1 m⁻²

1 m⁻¹

1 m⁻³

16 / 20

Lenses are used in optical devices;

Eye glasses

Camera

Microscope

All of these

17 / 20

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

Principal axis

Principal focus

Optical centre

Focal length

18 / 20

Optical centre is represented by

A

C

F

f

19 / 20

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

Snell's law

Refractive index

Reflective index

Critical angle

20 / 20

SI unit of power of lens is:

Meter

Millimeter

Centimeter

Diopter

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Practice MCQs Test No 3

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226

Class 10 Physics

Chapter 12

Practice MCQs Test No 3

1 / 20

Which statement is correct about image formed by camera?

All of these

Inverted image is formed

Diminished image is formed

Real image is formed

2 / 20

Endoscope which is used to diagnose throat is;

Cystoscope

Gastroscope

None of these

Bronschoscope

3 / 20

When object is at F the image is;

Not formed

Small

Inverted

Real

4 / 20

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

Projector

Microscope

Telescope

lightpipe

5 / 20

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

Telescope

Projector

Microscope

Endoscope

6 / 20

Endoscope used to diagnose the stomach is;

Cystoscope

Pancreoscope

Gastroscope

Bronchoscope

7 / 20

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

All of these

Real, inverted

Smaller than object

Between F and 2F

8 / 20

Optical device is;

All of these

Photograph enlarger

Camera

Slide projector

9 / 20

The study of behavior of light is called;

Geometry

Plasma

Optics

Geometrical optics

10 / 20

Which statement is correct about compound microscope?

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

It is used to see very small object

All given statements are true.

Focal length of objective lens is smaller than eye piece.

11 / 20

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

Electron microscope

Compound microscope

Light microscope

Simple microscope

12 / 20

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

Less than 2F

More than F

More than 3F

Both more than F and less than 2F

13 / 20

It has positive focal length;

Convex lens

Concave lens

None of above

Simple lens

14 / 20

For a converging lens f is;

Smeller

Positive

Negative

Sometime negative and sometime positive

15 / 20

Lens formula is

1/f=q/p+1/q

1/p=1/f+1/q

1/f=1/p-1/q

1/f=1/p+1/q

16 / 20

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

Smaller

Negative

Positive

Larger

17 / 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

C

2F

18 / 20

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

Refraction

Incidence

Diffraction

Reflection

19 / 20

For seeing tiny objects we use microscope of;

Light microscope

Low resolving power

Electron microscope

High resolving power

20 / 20

The working principle of photograph enlarger is the same as;

Telescope

Endoscope

Camera

Slide projector

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Practice MCQs Test No 4

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221

Class 10 Physics

Chapter 12

Practice MCQs Test No 4

1 / 17

Magnification of telescope can be determined by using formula;

M=F/L

M=fₒ/fₒ

M=fₒ/fₑ

M=Lₒ/fₒ

2 / 17

The variation of focal length of eye lens is called;

Variation

Magnification

Resolution

Accommodation

3 / 17

Human eye acts like;

Telescope

Camera

Kaledoscope

Microscope

4 / 17

Short sighted may be due to eyeball being

Too thick

Too thin

Too short

Too long

5 / 17

Long sightedness is removed by:

Convex mirror

Concave mirror

Concave lens

Convex lens

6 / 17

The nearsighted eye can be corrected by using;

Both converging and diverging lenses

Concave mirror

Converging lens

Diverging lens

7 / 17

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

Kaledoscope

Light microscope

microscope

Telescope

8 / 17

Light enters the eye through transparent membrane called;

Retina

Pupil

Cornea

Iris

9 / 17

The magnification of compound microscope is;

M=L/fₑ(1+d/fₑ)

M=L/fₒ

M=L/fₒ(1+d/fₑ)

M=(1+d/fₑ)

10 / 17

Have ability to move eye lens forward or backward.

Human

Dog

Birds

Fish

11 / 17

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

Pupil

Eye lens

Cornea

Iris

12 / 17

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

Both Short-sighted and near-sightedness

Far sightedness

near-sightedness

Short-sighted

13 / 17

Long sightedness is caused due to ________ eye ball:

Thin

small

Thick

Both thick and small

14 / 17

Power of concave lens is:

Less

Greater

Negative

Positive

15 / 17

Farsightedness is corrected by using;

Diverging lens

Concave mirror

Convex mirror

Converging lens

16 / 17

Near point of a normal human being is:

25cm

Infinity

100cm

50cm

17 / 17

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

isometropia

hypermetropia

Myopia

Short sightedness

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