Page 106 - CITS - WCS - Mechanical

WORKSHOP SCIENCE - CITS

Fluid mechanics, science concerned with the response of fluids to forces exerted upon them. It is a branch
of classical physics with applications of great importance in hydraulic and aeronautical engineering, chemical
engineering, meteorology, and zoology.

Example 1: A current of 0.8 A flows through the resistor , The potential difference is given as 16 Volts. What is
the resistance of the resistor?
Given:
Electric current(I) = 0.8A
Potential difference(V)= 16 v
To find: Resistance (R)

Formula:
V= IR
Solution:
Therefore, the resistance of the resistor is 20 ohms.
Example 2: How much current will an electric bulb draw from a 120 V source, if the resistance of the bulb filament
is 1000 Ω?
Given:
Resistance (R) = 1000
Potential difference (V) = 120
To find: Electric current (I)
Formula:
V =IR
Solution:
Therefore, the electric bulb will draw 0.12 Ampere of current.
Example 3: How much current will an electric heater coil draw from a 120 V source, if the resistance of the heater
coil is 100 Ω?
Given:
Resistance (R) = 100 Ω
Potential difference (V) = 120 V
To find: Electric current (I)
Formula: V=IR
Solution:

Therefore, the electric bulb will draw 1.2 Ampere of current.

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CITS : WCS - Mechanical - Exercise 9 CITS : WCS - Mechanical - Exercise 9