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Question

A concave mirror gives real , inverted and small size IMAGE if the object is placed :

(a) At F

(b) At infinity

(c) At C

(d) Beyond infinity

Answer

The correct option is : (b) At infinity

When an object is placed at infinity, highly diminished real and inverted image is formed . The image is formed at Focus (F)

About other options

• (a) When an object is placed at Focus (F) , image formed is real and inverted but is highly enlarged .

• (c) When an object is placed at CENTRE of curvature (C) , the image formed is real and inverted but is of same size with the object

• (d) Beyond the LEVEL of infinity is never calculated . This option is probably provided to confuse the student.

Answer:

Speed, being a SCALAR quantity, is the rate at which an object covers distance. The AVERAGE speed is the distance (a scalar quantity) PER time ratio. ... On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the POSITION changes....

Answer:

An Astronomical UNIT

Explanation:

The astronomical unit is used primarily for measuring distances within the Solar SYSTEM or around other STARS. It the most widely common it terms of TRAVELLING outside our Solar System.

ANSWER:

Both STATEMENTS are true but Reason isn't a CORRECT reason for ASSERTION.

EXPLANATION:

I= V/R

R= 1.7×10^-8×1×10^-2/3.14×2×2×10^-6

0.13×10^-4

I= 120/0.13×10^-4

=923×10^4

DIMENSION of ωt= Dimension of kx

ωt=

rad is dimensionless.

so

ωt= dimensionless.

Hence,

kx=dimensionless.

k=1/x

k=L⁻¹

ANSWER:

GIVEN QUESTION is in COMPLETE

There are 11 MAJOR organ systems in the human body, which INCLUDE the circulatory, respiratory, digestive, EXCRETORY, NERVOUS and endocrine systems..

hope it helps. !

plz MARK it as brainliest. !

366,666.667

Explanation:

33/9.00×10^-4

33 * 100000 / 9 = 3666666.667

ANSWER:

ANS. is 1

Explanation:

R=V/I

(volt/current)

R=5/5

R=1 OHM OR omega.

Mark as BRAINLIEST..

Explanation:

▪️Initial force ⇒F=Kr2qq

▪️Final force ⇒F=K(2r)2(2Q)(2q)=4r24Kqq=r2Kqq

▪️Thus, the force will REMAIN UNCHANGED.

ANSWER:

answer is B -40meters

IF IT IS CORRET BRILIANT

Answer:

the OBJECT which are perform in the various filed to DEVELOP in our images for good PERFORMED

the VELOCITY of LIGHT is 3x10^8 in the VACCUM

ANSWER:

if he is moving then YES but he is STANDING on ONE place then no

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h

Explanation:

▪️When a conductor is passed through a magnetic field, a CURRENT is induced in the conductor.

▪️This process of simple flow of current through the entire wire or CABLE is REFERRED to as Electromagnetism.

▪️On the basis of electric current flowing through the conductor, the magnetic field around it exhibits NORTH and south directions.

Hopes it help you❤️❤️

Answer:

ROYAL bengal

black and sallow

common, striped

half-starved bengal

HUNGRY and unreliable

particularly hungry and unreliable

large bengal

magnificent bengal

hope it HELP u

mark as BRAINLIST

Answer:

Iodine is a METAL that EXISTS as a VIOLET SOLID at ROOM temperature

HOPE it HELPS !

PLZ MARK it as BRAINLIEST !

ANSWER:

YES possible

charge is quantized

Answer:

where is ur QUESTION???

EXPLANATION:

make it RIGHT questions..

Answer:

2.5m/s square

Explanation:

Here,

We have to FIND -

▪️v=u-at

▪️a=u-v/t

▪️u=15m/s

▪️v=10m/s

▪️t=2s

▪️a=2.5m/s2

Answer:

the k MAP is :

1 0 1 1

0 0 1 1

0 1 0 0

1 1 0 1

B'D' + A'C + AC'D

ANSWER:

FIRST you have to FOLLOW me

EXPLANATION:

lens is a clear object, usually made of GLASS or plastic, which is used to refract, or bend light. Lenses can concentrate light rays (bring them together) or spread them out. Common examples of lenses include camera lenses, TELESCOPE lenses, eyeglasses, and magnifying glasses. Lenses are OFTEN double lenses, meaning they have two curved sides. A convex lens is rounded outward, while a concave lens CURVES inward.

ANSWER:

SEE the ATTACHMENT PLEASE

Explanation:

Hope the answer will help you

Answer:

In order to increase the spatial RESOLUTION of an imaging system, one straight forward way is to increase the sensor density by reducing the sensor size. HOWEVER, as the sensor size decreases, the amount of LIGHT incident on each sensor also decreases, causing the so called SHOT NOISE.

ANSWER:

WHERE IS THE GIVEN FIGURE MATE ???

JOULE is the OLD unit of WORK

ANSWER:

cvbnm,dfghj fhjnbcdr567uijmnb drtyujnbvcdr567uij dertyhuj

Explanation:

Answer:

blunt BLADES is having more surface area

more surface area means LESS SHARP so it is DIFFICULT to cut a piece of cloth with a blunt scissor

Answer:

When a GLASS rod is RUBBED with silk, the glass rod loses electrons to the silk piece. The glass rod has free electrons which are less TIGHTLY BOUND so get transferred to the silk cloth. The glass rod has defeciency of electrons and acquired apositive charge while the silk cloth acquires a negative charge.

Hope this HELPS you

Answer:

VERNIER Constant: it is the ratio of SMALLEST division of main scale to the NUMBER of DIVISIONS of vernier scale. Least Count: the smallest possible measure that any instrument can do accurately is KNOWN as least count

GIVEN:

Two vectors a and b are equal in magnitude but PERPENDICULAR to each other.

To Find:

Assuming a suitable scale REPRESENT their following combination a+2b, a-2b, 2a-b, b-1/2a​?

Solution:

it is given that , two vectors a and b are equal in magnitude but perpendicular

to each other.

therefore, a =  b and θ = 90 degree :ANGLE between a and b.

so, according to question, we have

for, a+2b;

for, a-2b

for , 2a-b

for, b-(1/2)a

ANSWER:

DEAR STUDENT here is your answer-

Answer:

Visible light communication (VLC) is a data COMMUNICATIONS variant which uses visible light between 400 and 800 THz (780–375 NM). VLC is a SUBSET of optical wireless communications technologies.

The technology uses FLUORESCENT lamps (ordinary lamps, not special communications devices) to transmit signals at 10 kbit/s, or LEDs for up to 500 Mbit/s over short distances. Systems such as RONJA can transmit at full Ethernet speed (10 Mbit/s) over distances of 1–2 kilometres (0.6–1.2 mi).

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ᴜ

Answer:

0 as the MAN has RETURNED to his INITIAL POSITION again

now,

Answer :

• position of IMAGE is 24 cm at POSITIVE principal axis.
• height of image is 48 cm below principal axis.
• nature of image is real and inverted.

Given :

• focal length of convex lens , f = 8 cm
• position of object , u = -12 cm
• height of the object , h₁ = 24 cm

To find :

• position of image, v = ?
• height of image, h₂ = ?
• Nature of the image

Formulae required :

• Lens formula

      1/f = 1/v - 1/u

• Formula for MAGNIFICATION of lens

      m = v/u = h₂/h₁

[ where f is focal length of lens , v is position of image , u is position of object ,m is magnification, h₂ is height of image and h₁ is height of object ]

Solution :-

Using lens formula to calculate position of image

→ 1/f = 1/v - 1/u

→ 1/8 = 1/v - 1/(-12)

→ 1/v = 1/8  - 1/12

→ 1/v = (3 - 2) / 24

→ 1/v = 1 / 24

→ v = 24 cm

Therefore,

image will be formed at 24 cm behind the lens. (i.e, at positive principal axis)

Using formula for magnification of lens to find the height of image

→ m = v/u = h₂ / h₁

→ v / u = h₂ / h₁

→ 24 / (-12) = h₂ / 24

→ -2 = h₂ / 24

→ h₂ = - 48 cm

Therefore,

height of image will be 48 cm below the principal axis.

And,

Nature of image will be real and inverted.

ANSWER:

VISIBLE light communication (VLC) is a data communications variant which uses visible light between 400 and 800 THZ (780–375 NM). VLC is a subset of optical wireless communications technologies.The technology uses fluorescent lamps (ordinary lamps, not special communications devices) to transmit signals at 10 kbit/s, or LEDs for up to 500 Mbit/s over short distances. Systems such as RONJA can transmit at full Ethernet speed (10 Mbit/s) over distances of 1–2 kilometres (0.6–1.2 mi).

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Thank you

ANSWER:

i can't UNDERSTAND your LANGUAGE

ANSWER:

176 is the answer i.e CIRCUMFERENCE because there will be no DISPLACED for a CIRCLE

EXPLANATION:

it is KEPLER hope it HELPS MARK as BRAINLIEST

EXPLANATION:

F=ma

30=7.5a

30/7.5=a

6/1.5=a is the ANSWER of this QUESTION

ANSWER:

Neil bohr proposed an atomic model based on PLANCK's QUANTAM theory of radiation

Answer:

What is the DIRECTION of magnetic field when current is PASSING through a circular coil of wire?

The direction of current in the circular part is anticlockwise and HENCE magnetic field due to this part is out of the plane of drawing as obtained by applying Right HAND thumb rule for circular wire.

ANSWER:

DENSITY=mass/VOLUME

So the unit of mass is kg nd the unit of volume is meter^3 put in above equation

Density=kg/m^3

But here kg is the unit of mass nd for dimention mass is reprensents by capital m nd same is the CASE with volume.volume is basically length so the unit of volume is meter CUBE which is reprents by capital L.put capital m nd capital L in above equation

Density=M/L^3

Or density=(M)(L)^-3 answer…

Answer:

56 m.

Explanation:

REFER to the ATTACHMENT...

ANSWER:

OXIDATION- CA

REDUCTION- H2