AP EAMCET · PHYSICS · Mathematics in Physics

The number of significant figures in $4.870 \mathrm{~m}$ is

A $3$
B $4$
C $2$
D $1$

Verified Solution

Answer & Solution

Correct Answer

(B) $4$

Step-by-step Solution

Detailed explanation

4.870 have 4 significant figures.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

. A bullet of mass $0.01 \mathrm{~kg}$ travelling at a speed of $500 \mathrm{~ms}^{-1}$ strikes a block of mass $2 \mathrm{~kg}$ which is suspended by a string of length $5 \mathrm{~m}$. The centre of gravity of the block is found to rise a vertical distance of $0.1 \mathrm{~m}$. What is the speed of the bullet after it emerges from the block?

AP EAMCET 2020 Hard
Speed of electron in its Ist Bohr's orbit is given by $2.18 \times 10^6 \mathrm{~ms}^{-1}$. If the time period of electron in $n$th orbit is measured as 4.10 femto second, the value of $n$ is

AP EAMCET 2019 Easy
A radioactive element $X$ converts into another stable element $Y$. Half life of $X$ is 2 hours. Initially only $X$ is present. After a time $t$, if the ratio of atoms of $X$ to $Y$ is $1: 4$, then the value of $t$ is

AP EAMCET 2018 Medium
The phenomena of lowering freezing point of water by the application of pressure is known as

AP EAMCET 2023 Easy
Electrostatic force between two identical charges placed in vacuum at distance of $r$ is $F$ . A slab of width $\frac{r}{5}$ and dielectric constant $9$ is inserted between these two charges, then the force between the charges is

AP EAMCET 2022 Hard
A compass needle oscillates $20$ times per minute at a place where the dip is $45 °$ and the magnetic field is $B_{1}$ . The same needle oscillates 30 times per minute at a place where the dip is $30 °$ and magnetic field is $B_{2}$ . Then $B_{1} : B_{2}$ is

AP EAMCET 2022 Medium

Explore more questions on app

From AP EAMCET

The point $(2,3)$ is first reflected in the straight line $y=x$ and then translated through a distance of 2 units along the positive direction $X$-axis. The coordinates of the transformed point are

AP EAMCET 2015 Easy
The force required to move a body up a rough inclined plane is double the force required to prevent the body from sliding down the plane. If the angle of inclination of the plane is $60^{\circ}$, then the coefficient of friction is

AP EAMCET 2019 Easy
The derivate of $y=\tan ^{-1}\left(\frac{\sqrt{1+x^2}-1}{x}\right)$ is equal to

AP EAMCET 2020 Easy
The equations of sides $\mathbf{A B}, \mathbf{B C}$ and $\mathbf{C A}$ of a $\triangle A B C$ are $2 x+y=0, x+p y=q$ and $x-y=3$ respectively. If $P(2,3)$ is its orthocenter, then the value of $p+q$ equals

AP EAMCET 2021 Hard
If $\left|z-\frac{2}{z}\right|=2$, then the greatest value of $|z|$ is

AP EAMCET 2023 Hard
If the coefficients of $(2 r+6)^{\text {th }}$ and $(r-1)^{\text {th }}$ terms in the expansion of $(1+x)^{21}$ are equal, then the value of $r=$

AP EAMCET 2024 Easy

Explore more questions on app

The number of significant figures in \(4.870 \mathrm{~m}\) is

Answer & Solution

Step-by-step Solution

See the Complete Solution