What is the voltage of a battery circuit with resistance of 3 ohms and current of 5 amps?
What is the voltage of a battery circuit with resistance of 3 ohms and current of 5 amps?
Answer: The correct answer is-15 Volts.
What happens to the current as the resistance increases?
Ohm’s law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to the resistance (R). Similarly, increasing the resistance of the circuit will lower the current flow if the voltage is not changed.
What happens to current if resistance decreases?
Likewise, if we increase the resistance, the current goes down for a given voltage and if we decrease the resistance the current goes up. Which means that if resistance is high current is low and if resistance is low current is high.
Does more current mean more resistance?
The circuit with the higher resistance will allow less charge to flow, meaning the circuit with higher resistance has less current flowing through it. …
What do you call a material that has a resistance of zero?
Your answer is : superconductor. Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors, when cooled below a characteristic critical temperature.
Why do Superconductors have no resistance?
A superconductor conducts electricity without resistance because the supercurrent is a collective motion of all the Cooper pairs present. In a regular metal the electrons more or less move independenly.
Why good conductors are not superconductors?
And superconductors are those materials which are usually bad conductors in room temperature but when the temperature is decreased to very low, the resistance becomes zero. That’s why good conductors can’t be transformed into superconductors.
Why is copper not a superconductor?
Copper and gold have too much ordinary nonsuperconducting electrons and too big conductivity in normal state. The gain in free energy from superconducting electrons cant compensate antigain from nonsuperconducting electrons and antigain of electron conductivity (hall constant <0).
Why do superconductors have to be cold?
By making the material cold there is less energy to knock the electrons around, so their path can be more direct, and they experience less resistance. …
Which metal is superconductor?
But at very low temperature, some metals acquire zero electrical resistance and zero magnetic induction, the property known as superconductivity. Some of the important superconducting elements are- Aluminium, Zinc, Cadmium, Mercury, and Lead.