Table of Contents
- 1 Why does current flow through a conductor when it is connected to two terminals of a cell?
- 2 Why does current not flow in a circuit when two cells are connected with their positive terminal facing each other?
- 3 Is the current derived from a battery always constant?
- 4 When no current is passed through a conductor?
- 5 What happens when both the terminals of a bulb are connected with the negative terminal of a cell?
- 6 What will happen if both the terminals are positive?
- 7 How does current flow in a battery?
- 8 What happens to current when batteries are connected in series?
Why does current flow through a conductor when it is connected to two terminals of a cell?
(b) An electric cell has two terminals. An electric cell has 2 terminals positive and negative. Question2. As metals are good conductors of electricity so they allow current to flow them easily.
Why does current not flow in a circuit when two cells are connected with their positive terminal facing each other?
When both sides are connected + side snatches electrons from – side. (And if there is a medium, conductor, then first electrons are taken from conductor that in turn snatches from – side, which not being able to keep electrons lose them and give up those electrons, we label it as excessive.)
Is the current derived from a battery always constant?
A battery produces direct current; the battery voltage (or emf) is constant, which generally results in a constant current flowing one way around a circuit. If the circuit has capacitors, which store charge, the current may not be constant, but it will still flow in one direction.
How do current travel in a battery when the terminals are connected?
The electrical driving force across the terminals of a cell is known as the terminal voltage (difference) and is measured in volts. When a battery is connected to a circuit, the electrons from the anode travel through the circuit toward the cathode in a direct circuit.
How does current flow in a conductor?
When an electric current flows in a conductor, it flows as a drift of free electrons in the metal. Electricity flows easily through a conductor because the electrons are free to move around in the object. Whenever there is a movement of electrons through a conductor, an electric current is created.
When no current is passed through a conductor?
When no current is passed through a conductor, the average of the velocities of all the free electrons at an instant is zero.
What happens when both the terminals of a bulb are connected with the negative terminal of a cell?
Answer: The bulb will glow only if the wire connecting it and the two terminals forms a complete loop. If both the terminals of the bulb are connected to the same terminal of the cell, then the bulb will not glow, as in figure (c).
What will happen if both the terminals are positive?
Explanation: Just connecting the positive terminals together doesnt going to do anything. If you connects only positive terminals and negative remains open then no current will flow as the circuit is open .
Is the current the same before and after a battery?
Total charge could be divided in a such way that more charge ends up in one, less charge in other. But the total charge could be conserved again. For example, the image applies Kirchhoff law in which the leaving and entering current for each battery is the same.
Is current the same across a battery?
During the discharge of a battery, the current in the circuit flows from the positive to the negative electrode. According to Ohm’s law, this means that the current is proportional to the electric field, which says that current flows from a positive to negative electric potential.
How does current flow in a battery?
What happens to current when batteries are connected in series?
Connecting batteries in series increases voltage, but does not increase overall amp-hour capacity. All batteries in a series bank must have the same amp-hour rating. Connecting batteries in parallel increases total current capacity by decreasing total resistance, and it also increases overall amp-hour capacity.