# What is the difference in electromotive force and terminal voltage difference? ## What is the difference in electromotive force and terminal potent difference?

The electromotive force refers to the energy it gives each coulomb charge. While the potential difference refers to the energy used by one coulomb charge, the potential difference is the energy given to the other.

## What is lost Volt?

Lost Volt: A potential difference between two terminals in a cell that decreases by an amount which does not contribute to the circuit is known as lost volt. This is called the e.m.f. Figure (a) shows the e.m.f. of the cell. The terminals of the cell are now connected to a 3.0 n resistor so that it can drive a current through them.

How is lost Volt calculated?

Voltage refers to energy and is always conserved. The EMF of a cell equals the sum of its terminal pot difference, Vt p.d,and the lost volts. This equation can also be written in other forms, such as E=I (R + r).

What is difference between terminal voltage and EMF?

Terminal Voltage is the potential difference between the terminals of a load at the moment the circuit is turned on. E.m.f. E.m.f. is the highest possible potential difference that a cell or generator can deliver when there is no current flowing through it. The voltmeter measures terminal voltage.

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### Why is lost Volt called so?

Solution: If E is the emf for a particular cell and V the potential difference across the circuit, then V=E-Ir. This means that the entire emf is not obtained from the external circuit. This is the lost volt.

### What is the role of resistors in a series circuit?

A resistor is an electrical component with a passive two-terminal that creates electrical resistance and acts as a circuit element. Resistors are used in electronic circuits to adjust current flow, reduce signal levels, divide voltages, bias active element and terminate transmission lines among other purposes.

What happens if you add more resistors to a series circuit?

Adding more resistors to a series circuit increases total resistance, and lowers current.

What is the purpose of a diode?

It allows current to flow in one direction but restricts current flow in the opposite direction. Because they convert alternating current (ac), into pulsating, direct current (dc), diodes are also known by the name rectifiers. The rating of diodes is determined by their type, voltage, current capacity, and other factors.

## How do you determine the value of a diode?

A diode’s rating can be determined based on its color. The color pattern of diodes can be used to determine the rating. They allow for conduction in one direction and block current in the opposite direction. You can read the value of diodes by looking at the colored stripes.

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