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Two electronics students are discussing static electricity and electric current. Student A says that a basic property of static electricity is the fact that it can't be detected. Student B says that an electric current results when electrons move in a conductor. Which of the following statements is correct? A. Neither of the two students is correct. B. Only Student A is correct. C. Both of the students are correct. D. Only Student B is correct.

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The answer is D. Only student B is correct. Student A is incorrect because static electricity can be detected through the principle of electrostatic induction, which will indicate if there are static electricity on the surface of an object. A device which can detect static electricity is an electroscope. Moreover, for student B, it is correct that the cause for electric current to flow is the uniform flow of free electrons.