Within a lightning bolt, current flows _____.

A. from positive to negative
B. from negative to positive
C. in both directions


Answer: B

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Fuel cells can be used in any application that we currently use ____.

a. geothermal energy b. thermal energy c. batteries d. carbon

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A five-wire actuator uses two wires to power the motor (power and ground) and three wires for ________.

A) Redundant control B) Direction control C) A feedback potentiometer D) Static electricity protection

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How do thermocouples work?

What will be an ideal response?

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What will be an ideal response?

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