When the switch is closed, the R2 resistance essentially becomes a non-factor and you have less resistance, which would mean you would have higher current.
Table of Contents
How do you solve a resistor problem?
How do you solve circuit problems in physics?
What happens if the switch is closed in a parallel circuit?
In a parallel circuit, the current will flow through the closed paths and not through the open paths. Consider a simple circuit with an outlet, a switch and a 60 watt light bulb. If the switch is closed, the light operates.
How do you solve resistors in parallel?
How do you calculate two resistors in parallel? Take their reciprocal values, add the two together and take the reciprocal again. For example, if one resistor is 2 ฮฉ and the other is 4 ฮฉ, then the calculation to find the equivalent resistance is 1 / (1/2 + 1/4) = 1 / (3/4) = 4/3 = 1.33.
How do you calculate resistors?
This is done using the following formula: Rtotal = R1 + R2 +R3 and so on. Example: To calculate the total resistance for these three resistors in series.
Why does resistance decrease when the switch is closed?
If the switch is closed (right), there is current in R2. What happens to the reading on the ammeter when the switch is closed? When the switch is closed, resistors R1 and R2 are in parallel, so that the total circuit resistance is smaller than when the switch was open.
What happens if a switch is open in a circuit?
No current can flow if the circuit is broken, for example, when a switch is open in the circuit ,current will not flow in any part of circuit as circuit is open and there is no closed path available for charge to flow.
How does a switch affect a circuit?
An electric switch is a device that interrupts the electron flow in a circuit. Switches are primarily binary devices: either fully on or off and light switches have a simple design. When the switch is turned off, the circuit breaks and the power flow is interrupted. Circuits consist of a source of power and load.
How does a resistor work physics?
Is a light bulb a resistor?
The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor.
How do you solve a series and parallel circuit problem?
To analyze a series-parallel combination circuit, follow these steps: Reduce the original circuit to a single equivalent resistor, re-drawing the circuit in each step of reduction as simple series and simple parallel parts are reduced to single, equivalent resistors. Solve for total resistance.
Does current flow when a switch is open?
A switch has two states Open or closed When a switch is open no current can flow through it. When a switch is closed current flows through it.
Can a switch have resistance?
Real switches have some finite, nonzero resistance when closed. This resistance causes a voltage drop which may or may not be significant depending on the rest of the circuit.
How do you find the current when the switch is closed?
What happens when you put 2 resistors in parallel?
Two identical resistors in parallel have an equivalent resistance half the value of either resistor. The current splits equally between the two.
How do you calculate resistance in a circuit?
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm’s Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 ฮฉ.
How do you calculate current in a parallel circuit?
Total current in a parallel circuit is the sum of the individual branch currents. This relationship in a parallel circuit is expressed as: IT = I1 + I2 + I3โฆ Whenever more resistances are connected in parallel, they have the effect of reducing the overall circuit resistance.
What are the 5 types of resistors?
- Fixed Value Resistors. These are the predominant type of resistor configuration, and as the name suggests, they have a fixed resistance value.
- Variable Resistors.
- Resistor Networks.
- Carbon Film Resistors.
- Metal Film Resistors.
- Wirewound Resistors.
- Metal Oxide Resistors.
- Metal Strip Resistors.
What are the 3 forms of Ohm’s law?
3-4: A circle diagram to help in memorizing the Ohm’s Law formulas V = IR, I = V/R, and R= V/I.
What color is a 470 ohm resistor?
470 Ohm 0.5W High Quality Carbon Film Resistor (CFR) with ยฑ5% Tolerance and Tin Plated Copper Leads. 470 Ohm Resistor Color Code: Yellow, Violet, Brown, Golden.
Does a closed switch have resistance?
A closed switch is equivalent to short circuit; hence it has the resistance of zero.
When the switch is closed its resistance is?
In a closed contact or a closed switch, theoretically, the resistance should be zero, but in actual measurements the resistance is very close to zero but not zero.
When a switch is open is the resistance between its terminals high or low?
Either using a meter or a conductivity/continuity tester, measure between the two screw terminals of this switch: if the resistance is low (good conductivity), then the switch is closed. If the measured resistance is infinite (no conductivity), then the switch is open.
Can current flow without resistance?
Current will flow, and since the resistance is low — though not zero — you will just get a really large current. This will heat up the wire just like any resistor (as you know). And typically that will cause problems like melting the wire or its insulation, or just starting a fire.