Step 1: Understanding pencil grades
Pencils are graded based on hardness and blackness:
- B (Black) pencils $\Rightarrow$ soft and dark
- H (Hard) pencils $\Rightarrow$ hard and light
- HB pencils $\Rightarrow$ medium hard/dark
Step 2: What is a 2H pencil?
2H is a hard pencil, which produces a light, thin, and precise line.
It is commonly used in technical drawings, blueprints, and initial sketches.
Step 3: Evaluating options
(A) 3B $\Rightarrow$ Very dark line due to softness
(B) 2H $\Rightarrow$ Light line, suitable for fine and clean work
(C) HB $\Rightarrow$ Medium, not as light as 2H
(D) None of these $\Rightarrow$ Incorrect since 2H is correct
\[
\boxed{\text{Correct Answer: (B) 2H}}
\]
$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.