Unit 202 Principles of Electrical Science

What number isrepresented by 2.3 x  $10^{-3}$  

• 0.23

• 0.023

• 0.0023

• 0.00023

Which two values of a right-angled triangle are used to determine the sine of an angle

• Opposite and Hypotenuse

• Adjacent and Hypotenuse

• Right angle and Opposite

• Adjacent and Opposite

What is the SI unit of measurement of charge?

• Farad

• Coulomb

• Henry

• Newton

What would be the force acting on the ground below a mass of 10Kg due to gravity?

• 0.981Kg

• 9.81N

• 98.1N

• 981N

How many electrons does copper atom have?

• 10

• 17

• 23

• 29

A series circuit has three 12 ohm resistors connected to 200V DC supply. What is the total circuit current?

• 50A

• 32A

• 16.6A

• 5.56A

What happens to the strength of the magnetic field around a conductor when another conductor, carrying equal current in the opposite direction, is placed next to it?

• Doubles in strenght

• Halves in strength

• Remains the same strength

• Cancels out to no strength

What does the thumb indicate when using right hand ''grip rule''?

• North Pole

• South Pole

• Current Flow

• Voltage Flow

What are transformer cores made from to reduce eddy current loss?

• Copper bars

• Plastic Tubes

• Laminated metal

• Glass sheeting

What electronic components allows current flow in one direction only?

• Resistor

• Diac

• Capacitor

• Diode