Question

10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of total turns is obtained 25mm. then a) What is the thickness of the wire? b) Express the thickness of the wire in centimetre.

please write correct answer

Answer 1

A. 2.5 mm

B. 0.25 cm

Step-by-step explanation:

A. Determination of the thickness of the wire.

Number of turns (n) = 10 turns

Length (L) = 25 mm

Thickness (T) =?

T = L / n

T = 25 / 10

T = 2.5 mm

Thus, the thickness of the wire is 2.5 mm

B. Determination of the thinkness in centimetres (cm).

Thickness (in mm) = 2.5 mm

Thickness (in cm) =?

Recall:

10 mm = 1 cm

Therefore,

2.5 mm = 2.5 mm × 1 cm / 10 mm

2.5 mm = 0.25 m

Therefore, the thickness of the wire in centimetre (cm) is 0.25 cm