PDH Quiz – Fundamental of Electricity and Electronics

1.	What does the following picture represent?
		Hydrogen peroxide
		Water molecule
		Ozone molecule
		Hydrochloric acid
2.	The neutron has approximately the same mass as the proton.
		True
		False
3.	The maximum number of electrons that can be contained in any shell or sub-shell is the same for all atoms and is defined as Electron Capacity =_________ . In this equation n represents the energy level in question.
		2n
		2n²
		2n³
		2n²+1
4.	Elements such as gold, copper and silver possess many free electrons and make good ______________.?
		Conductors
		Insulators
		Semi-conductors
		None of the above
5.	Which of the following figure shows arrangement of molecules in a piece of magnetized magnetic material?
		Figure A
		Figure B
6.	The following picture represents _____________________.?
		Right hand rule
		Left hand rule
		Current rule
		None of the above
7.	Charge ‘Q’ is measured in ____________.?
		Volts
		Coulombs
		Joules
8.	If I = Current in amperes (A), E = Voltage (V), R = Resistance (Ω) then Ohm’s law may be expressed as _____________.?
		I = E/R
		I = ER
		I = ER²
9.	If we have a conductor that is 1 meter long with a cross-sectional area of 1 mm² and has a resistance of 0.017 ohm, what is the resistance of 50m of wire from the same material but with a cross-sectional area of 0.25 mm²?
		2.4Ω
		3.4Ω
		4.4Ω
		5.4Ω
10.	The resistance of a material is determined by _________________.?
		Material
		Length and area
		Temperature
		All the above

Fundamental of Electricity and Electronics