1. ELECTRICAL QUANTITIES AND UNITS
BY : AMIT PHOGAT

2. CHARGE Base unit = coulomb Symbol = Q Abbreviation = C
also the base unit for current and voltage
Symbol = Q
Abbreviation = C

3. CURRENT
Electric current – movement of charged particles in a specific direction
Electrons, pos ions, neg ions
Speed of light (186,000 miles per sec.)
Symbol – I (intensity of the electricity)
Unit of current – ampere (amp)
Coulombs per second
1A = 1 coulomb/sec

4. CURRENT Direct current Alternating current Dc
Current travels in same/one direction
Flashlight cells, and batteries
Alternating current Ac
Current periodicallly reverses the direction in which it is moving
In your house (every 1/120 of a sec)
In tv receiver (every 1/67,000,000 of a sec)

5. VOLTAGE Electric pressure that causes current flow Symbol = V
Electromotive force (emf)
Symbol = V
Types of energy
Kinetic energy
Energy in motion, energy doing work, or energy being converted into another form
Potential energy
Energy that can be stored for a long period of time in its present form
Capable of doing work

6. RESISTANCE Opposition a material offers to current Symbol – R
Unit of resistance – omega symbol
Measured in ohms
Converts electric energy into heat energy when current is forced through a material