Blogs
on April 19, 2020
ELECTRIC CURRENT POTENTIAL DIFFERENCE AND RESISTENCE
Electric Current
Electric current is the rate of flow of charges per seconds in a circuit
,
Q=It
Example
If 16200C coulomb of charges flow in a circuit for 60mins , what is the value of current flow in the circuit ?
Example 2
A current of 2A flows in a circuit for 60 seconds , what is the coulomb of charges flow in the circuit ?
Q=it = 2 x 60 = 120C
CURRENT IN SERIES AND PARALLEL CIRCUIT
The above Fig 1 shows current in a parallel circuit while fig 2 shows current in a series circuit
In the series circuit . of fig 2
In the parallel circuit of fig 1
The opposite of this is voltage in series and parallel
Voltages in series
Voltages in parallel
POTENTIAL DIFFERENCE
The potential difference is defined as the work done when one coulomb of electricity moves from one point to another
V=W/Q where w=work done and Q = Quantity of Electricity
V=W (volt) when Q=1 coulomb
Note , Quantity of Electricity = Quantity of charge flow
Example
If 50 joules of work is required to move 100 coulomb of charges from one point to another in a circuit, what is the potential difference in the circuit ?
V=w/Q = 50/100 = 0.5V
VOLTAGE IN SERIES AND PARALLEL
Voltage in series is
Voltages in parallel
Example
. ?
V = 10+20+40
V=70V
Posted in: Education
Be the first person to like this.