Does a flashlight have a series or parallel circuit?
A flashlight contains batteries wired in a series circuit. Batteries can be wired in parallel, too. If the two positive terminals are con- nected to each other and the two negative terminals are connected to each other, charge will flow from both batteries.
Why are series circuits used?
A series circuit provides exactly one path between any two points for electric current. These circuits have the advantage of making each component very dependent on the other components. All of the current that will flow through an electrical device must first flow through the circuit breaker (or fuse).
What is the advantage of connecting cells in series in a flashlight?
Advantages: Connecting batteries in series will be doubling the voltage, while maintain the same amount of current. Series circuits do not overheat easily. This makes them very useful in the case of something that might be around a potentially flammable source, like dry plants or cloth.
What is the disadvantages of series circuit?
The first disadvantage is that, if one component in a series circuit fails, then all the components in the circuit fail because the circuit has been broken. The second disadvantage is that the more components there are in a series circuit, the greater the circuit’s resistance*.
Why is current same in series?
In a series circuit, the current is the same at each resistor. The voltage drop (I•R) will be the same for each resistor since the current at and the resistance of each resistor is the same. Thus the electric potential difference across any one of the bulbs will be the same as that across any one of the other bulbs.
Is current the same in parallel?
In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents flowing through each component.
What is the main disadvantage of parallel circuits?
The major disadvantage of parallel circuits as compared to series circuits is that the power remains at the same voltage as the voltage of a single power source . parallel circuits cannot be effectively used.
Why is current not constant in a parallel circuit?
Each resistor in parallel has the same voltage of the source applied to it (voltage is constant in a parallel circuit). The voltage across each resistor within a parallel combination is exactly the same but the currents flowing through them are not the same as this is determined by their resistance value and Ohms Law.
What is Ohm’s law solved for current?
Ohm’s law formula The resistor’s current I in amps (A) is equal to the resistor’s voltage V in volts (V) divided by the resistance R in ohms (Ω): V is the voltage drop of the resistor, measured in Volts (V). In some cases Ohm’s law uses the letter E to represent voltage.
What are the 3 power equations?
P = ΔV2 / R We now have three equations for electrical power, with two derived from the first using the Ohm’s law equation. These equations are often used in problems involving the computation of power from known values of electric potential difference (ΔV), current (I), and resistance (R).