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

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Definitions:

Cellular Respiration

A metabolic process in cells where organic molecules are broken down to release energy used for vital functions.

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.

Carbon Dioxide

A transparent gas with no odor, resulting from the burning of carbon-containing substances and the respiration process. It naturally occurs in the environment and is crucial for plant photosynthesis.

Methane

A colorless, odorless flammable gas that is the simplest alkane, used as a fuel and in chemical synthesis.