Electricity Flashcards
Definition of electrical current as the charge is transferred per unit time
Current is the rate of flow of charge.
Relationship to find charge current and time
Q =IT
Difference between alternating and direct current (ac) (dc)
Dc only flows in one direction
What does a charged particle experience in an electric field
Force
What path does a charged particle follow
between two oppositely charged parallel plates; near a single point charge; between two oppositely charged points; between two like charged points.
What is potential difference (voltage) of the supply a measure of
Energy given to charge the carriers in a circuit
Formula for potential difference
V=IR
Formula for current
I=V/R
Formula for resistance
R=V/I
Relationship between temp and resistance of a conductor
the resistance increases as the temperature increases in conductors the resistance increases as the temperature increases in conductors
Experiment to verify ohms law
When a resistor is kept at a constant temperature, its resistance will remain unchanged. We can confirm this experimentally by connecting a resistor to a power supply and measuring the current in the resistor as the supply voltage is increased.
Knowledge of MOSFET transistor
Turns on at 1.8 above
Knowledge of NPN transistor
Turns on 0.7 or above
Formula to solve total Resistance of resistor in series circuits
Rt=R1+R2..
Formula for combination of series and parallel total resistance
1/R=1/R1+1/R2
