Quick Answer: When No Potential Difference Is Applied Across A Conductor No Current Flows In The Conductor Because?

Can current flow in the circuit if there is no potential difference applied?

So the answer is , yes, a current can exist in a closed circuit on the the zero resistance wires.

It is enough that an electromotive force supplies the energy for the current.

For increments in the circuit where there is no voltage drop Ohms law is undefined, as 0/0, it cannot be used to find the current..

When a potential difference is applied across a conductor?

When a potential difference (V) is applied across a conductor, the thermal speed of electrons is. Join the 2 Crores+ Student community now! Rajasthan Govt. plans to reopen schools for class 9 to 12 in first week of Jan 2021.

What causes the current to flow in a conductor?

Electric current is flow of electrons in a conductor. The force required to make current flow through a conductor is called voltage and potential is the other term of voltage. For example, the first element has more positive charges, so it has higher potential.

What is relaxation time in a conductor?

Relaxation time is defined as the time interval between two successive collisions of electrons in a conductor when current flows through it.

When a potential difference is applied?

At 0 K, a semiconductor becomes a perfect insulator. Therefore at 0 K if some potential difference is applied across an indicator or a semiconductor, current is zero. But a conductor will become a superconductor at 0 K. Therefore, current will be infinite.

When a potential difference is applied across the two ends of the conductor an electric field exists?

When a potential difference is applied across the ends of a conductor, an electric field is set up inside the conductor and each free electron in the conductor experiences a force in the direction opposite to the electric field and free electrons get accelerated from negative end to the positive end of the conductor.

How does drift velocity depend on applied voltage?

vd is the drift velocity of the charge carriers. It is primarily controlled by the applied voltage, although it also depends the molecular structure of the wire. (In an ohmic device this velocity is directly proportional to applied voltage and thus provides the linear relationship between current and applied voltage.)

Does length of wire affect current?

Length of wire definitely have effect on current and voltage.. Resistance is directly proportional to length. As the length increases, resistance increases, as a result current decreases. … As the length increases, resistance increases, as a result current decreases.

What happens to the flow of charge when the potential difference between two points becomes zero?

Since the first branch has no resistance, according to V=IR, the potential difference between the points is zero and hence no charge will flow through the two points and all charges will take the second path.

When no current flows through a conductor?

Hint: Even when no current passes through the conductor, the electrons are in a state of random motions, caused by thermal excitement. The random motions, turns their net velocity to be 0.

What happens when a current passes through a conductor?

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. … When resistance is increased in a circuit , for example by adding more electrical components , the current decreases as a result.

Does electricity flow through or around a wire?

The wire is simply a pathway for the electrons to travel. Wires are made of metals, which are conductors. Conductors have some electrons that are rather free to move. Electric current (electricity) is a flow or movement of these electrons through the conductor.

Do electrons actually move in a conductor?

Electrons do not move along a wire like cars on a highway. Actually, Any conductor (thing that electricity can go through) is made of atoms. … If you put new electrons in a conductor, they will join atoms, and each atom will deliver an electron to the next atom.

What is potential difference between two points in a circuit?

Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. **Measured in Volts: **Potential difference (p.d.) is measured in volts (V) and is also called voltage.

When the potential difference is zero the value of current is?

Yes, the voltage across both ends of an ideal wire is always zero. [given U = R * I] is the current also zero? No, it means that the current can have an arbitrary value.