Why is current 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). Parallel resistors do not each get the total current; they divide it (current is dependent on the value of each resistor and the number of total resistors in a circuit).
Which circuit has the greatest resistance series or parallel?
Resistors in series and parallel
- The same current flows through each resistor:
- Potential difference is distributed among series resistors:
- The resistor with the biggest resistance has the greatest voltage.
- The equivalent resistance R s R_s RsR, start subscript, s, end subscript is always more than any resistor in the series configuration.
Where is the most resistance found in a circuit?
Most of the resistance in circuits is found in components that do specific work, such as bulbs or heating elements, and in devises called resistors. Resistors are devises that provide precise amounts of opposition or resistance to current flow.
What causes the resistance in a wire?
Resistance increases with the temperature of the wire. The hotter wire has a larger resistance because of increased vibration of the atomic lattice. When a material gets hotter the atoms in the lattice vibrate more.
How does the length of wire affect the current in the circuit?
“The longer the length of the wire, the greater the resistance, thus reducing the current flowing through the wire and vice versa for a smaller length of wire.”
What factors affect the brightness of a bulb in a circuit?
Increasing the voltage increases the brightness of the bulb. When a bulb in a series circuit is unscrewed all bulbs in the circuit go out. Increasing the number of bulbs in a series circuit decreases the brightness of the bulbs. In a series circuit, the voltage is equally distributed among all of the bulbs.
What will happen to the bulb if the resistance of the rheostat is reduced?
In the similar way, if we decrease the resistance of the rheostat, the flow of electric current through the light bulb increases. As a result, the light brightness increases.