- 1 R = 1 R 1 + 1 R 2.
- 1 R = 1 2 + 1 6.
- ⇒
- ⇒ R = 6 4 Ω
How do you find the resultant resistance?
According to Ohm’s law, the voltage drop, V, across a resistor when a current flows through it is calculated by using the
equation V=IR
, where I is current in amps (A) and R is the resistance in ohms (Ω). This implies that the total resistance in a series is equal to the sum of the individual resistances.
What is resultant resistant?
When resistances are connected in series then the resultant resistance is
the sum of all individual resistances
. Ie, … And sum of potential difference of individual resistance is equal to the total potential difference of the main cell or battery.
What are resistance values?
Resistance is
a measure of the opposition to current flow in an electrical circuit
. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.
What is the resultant resistance of the combination?
Resultant resistant is
equal to the sum of the resistances
in series connection.
What is the effective resistance?
In a complex circuit consisting of two or more resistors, the effective resistance is
the measure of the total resistance of all the resistor in the circuit
. The resistors can either be connected in parallel combination or series combination.
What is the resistance formula?
Resistance
has units of ohms (Ω), related to volts and amperes by 1 Ω = 1 V/A. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.
What is the formula for parallel resistance?
The sum of the currents through each path is equal to the total current that flows from the source. You can find total resistance in a Parallel circuit with the following formula:
1/Rt = 1/R1 + 1/R2 + 1/R3 +.
.. If one of the parallel paths is broken, current will continue to flow in all the other paths.
What is the formula of effective resistance?
The effective resistance between vertices a and b (after connecting a voltage source between them) is defined as the potential difference between a and b per unit net current from a to b. In other words,
Rab = va vb Iab
. Once we fix the current from a to b to be Iab = 1, the effective resistance becomes Rab = va vb.
What are the 4 types of resistors?
- Carbon Composition Resistor.
- Thermistor.
- Wire Wound Resistor.
- Metal Film Resistor.
- Carbon Film Resistor.
- Variable Resistor.
- Varistor
- Light Dependent Resistor.
What is a good resistance reading?
It automatically subtracts test lead resistance—typically 0.2 Ω to 0.5 Ω. Ideally, if test leads touch (are shorted together), the display should show
0 Ω
. … Read the measurement on the display.
What causes resistance?
An electric current flows when electrons move
through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
In which case the resultant resistance is less?
The
reciprocal of
the combined resistance of a number of resistances connected in parallel is equal to the sum of the reciprocals of all the individual resistances. The resultant resistance is less than either of the individual resistances.
How do you calculate resultant current?
If the supply frequency is 50Hz. A circuit consists of 3 parallel branches the branch current are given as i1= 10 sin (wt), i2=20 sin(wt+600) and i3=75 sin(wt -300). Find the resultant current and express it in the form
i=Im sin(wt+0)
. If the supply frequency is 50Hz.
