A 500-EV Electron and a 300-EV Electron Trapped in a Uniform

question 17

Multiple Choice

A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?

• A) 2.8
• B) 1.7
• C) 1.3
• D) 4.0
• E) 1.0

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Definitions:

Defence Mechanisms

According to Sigmund Freud, mechanisms through which the ego allows the expression of libidinal desires in a distorted or symbolic form.

Repression

A psychological defense mechanism where unsettling thoughts, memories, or desires are unconsciously pushed from the conscious mind.

Fundamental

Fundamental refers to serving as an essential component or basis for something, being of central importance.

Defence Mechanism

Psychological strategies brought into play by the unconscious mind to manipulate, deny, or distort reality in order to defend against feelings of anxiety and unacceptable impulses.