A Battery Has an Emf of 9 V and an Internal

question 55

Multiple Choice

A battery has an emf of 9 V and an internal resistance of 2 $\Omega$ .If the potential difference across its terminals is greater than 9 V:

• A)it must be connected across a large external resistance
• B)it must be connected across a small external resistance
• C)the current must be out of the positive terminal
• D)the current must be out of the negative terminal
• E)the current must be zero

---

Definitions:

Graph of Equation

A visual representation of all the points that satisfy a given equation, plotted on a coordinate grid.

Method of Substitution

A technique used to solve systems of equations by solving one equation for one variable and then substituting that expression into another equation.

System of Equations

A set of two or more equations with the same set of unknowns, which are solved together to find a common solution.

Method of Substitution

A technique used to solve systems of equations where one equation is solved for one variable, which is then substituted into other equations.