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TaigaMichael Faraday is credited with inventing the concept of electromagnetic field detection in the early 19th century, which later led to the development of the EMF detector. The modern EMF detector is a device that can measure electromagnetic fields in the environment, and is commonly used in paranormal investigations and by electricians to detect sources of electromagnetic interference.
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A device that provides an emf?
An example of a device that provides an electromotive force (emf) is a battery. A battery produces a voltage difference between its terminals, which creates an electric current when connected to a circuit. This emf is the driving force that pushes electrons through the circuit.
What is the Condition for terminal voltage across a secondary cell to be equal to its emf?
The condition for the terminal voltage across a secondary cell to be equal to its emf is when there is no current flowing through the cell. When there is no current, there is no voltage drop across the internal resistance of the cell, and thus the terminal voltage equals the emf.
What is the term for he phenomenon of emf development between two different metals placed in contact?
The term for the phenomenon of emf development between two different metals placed in contact is called the thermoelectric effect. This effect occurs because of the temperature difference between the two metals, which creates a potential difference or voltage.
Why emf is not zero when field current is zero?
Even when the field current is zero, there can still be a residual magnetic field present in the system, which can induce an electromotive force (emf) in a nearby conductor. This phenomenon is explained by Faraday's law of electromagnetic induction, where a changing magnetic field can induce a voltage in a closed loop.
What can be used to help detect a carbon monoxide build upon a boat?
A carbon monoxide detector.
