Chapter 25, Problem 1STP

To determine

To Choose: The correct option.

Answer to Problem 1STP

Option B

Explanation of Solution

Introduction:

EMF is not a force but an electric potential difference (energy per unit of charge). A difference in electrical potential result to increase electric current is called electromotive force.

The Electromotive Force is the potential difference by change in the magnetic field.

EMF is the electrical action produced by a non-electrical source. There are some devices which converts the other form of electrical energy into the electrical energy such as battery, generators, etc.The unit equation for EMF:

Variables: $EMF\text{ = }Blv$

Units: $\text{V=}\left(\frac{\text{N}}{\text{A}\text{.m}}\right)\left(\text{m}\right)\left(\text{m/s}\right)\text{=}\frac{\text{N}\text{.m}}{\text{A}\text{.s}}\text{=}\frac{\text{J}}{\text{C}}\text{=V}$

Conclusion:

Thus,option B is the correct option.