An Electron with a Speed of 2

question 75

Multiple Choice

An electron with a speed of 2.0 *10⁶ m/s moves into a uniform electric field of 325 N/C that is parallel to the electron's motion. How long does it take to bring the electron to rest? (m_e = 9.11 *10 ^{- 31} kg, e = 1.6 *10 ^{- 19} C)

• A) 3.5 *10 ^{- 8} s
• B) 2.3 *10 ^{- 6} s
• C) 2.3 *10 ^{- 8} s
• D) 1.2 * 10 ^{- 7} s

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Definitions:

Unconditioned Response

An automatic, unlearned reaction to a stimulus, such as salivating when smelling food.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without the need for prior learning.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with the unconditioned stimulus, eventually comes to trigger a conditioned response on its own.

Conditioned Response

A learned response to a previously neutral stimulus that has been repeatedly presented along with an unconditioned stimulus.