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How does voltage cause current to do work?
A voltage will cause electrons or other charge carriers to flow (if there is a path through which they can flow). In other words, it will cause a current.
Why can friction cause a build up of static charge?
Friction can cause a build-up of static charge because when two objects rub against each other, electrons can be transferred from one material to the other, creating an imbalance of positive and negative charges. This imbalance leads to the accumulation of static charge on the surfaces of the materials involved in the friction.
How can charge be produce?
Electrical charge can be produced from an electromagnet. This is a core i.e. iron wrapped in a wire coil. A magnetic device then passing by can cause an electrical charge to be produced, typically AC (alternating current).
How can an electrical current cause an iron nail to become temporary magnet?
By making the magnetic field around it a negative charge
Do objects need to be touching to transfer charge?
No, objects do not need to be touching to transfer charge. Charge can be transferred through a process called induction, where the presence of a charged object can cause a redistribution of charge on another object without direct contact.
A grounding wire allows the movement of electrons in which direction?
Electrons flow from the negative terminal to the positive. Conventional current or simply current, behaves as if positive charge carriers cause current flow. Conventional current flows from the positive terminal to the negative
What is the cause of a magnetic field about a current-carrying wire?
A magnetic field is created around a current-carrying wire due to the flow of electric charge. The moving electrons in the wire generate a magnetic field perpendicular to the direction of the current flow, following the right-hand rule. This phenomenon is described by Ampère's law.
What is a charge in motion called?
These forces that cause a change in motion are called Unbalanced Forces, therefore forces that never cause a change in motion and stay the same are called Balanced Forces.
What cause the pointer to move in a galvanometer?
Basically, the pointer moves due to measuring the direct current (flow of electric charge) through an electric circuit.
Do electrical charges left in the earth from lightning affect people?
No. When a bolt of lighting strikes the ground, the electrical charge dissipates to ground very quickly. The lightning may cause fires or destroy trees or steeples, but the residual charge is gone within seconds.
What is the minimum amount of current enough to kill a man?
100mA of 60Hz AC current for three seconds can cause ventricular fibrillation. From "Deleterious Effecst of Eelctric Shock", Charles F. Dalziel.
What substance is transferred to cause fertilization in flowering plants?
pollen
