You have two electrically charged objects, labeled T and B. You find that when y

Question

You have two electrically charged objects, labeled T and B. You find that when you bring these objects near each other, they repel each other. Which of the following is a true conclusion that can be drawn from this experiment? A. Objects T and B carry charges with the same sign. B. Objects T and B carry charges with opposite signs. C. Object B is definitely negatively charged. D. Object T is definitely negatively charged. Which of the following equations would be the most appropriate to use to fit data of intensity vs. distance to theory that was described by an inverse-square law? A y = e^-2x B. y = Ax^2 C. y = 2x + b D. y = Ax^-2 In an experiment to detect radioactivity of a substance, a Geiger counter detects 500 pulses in 300 seconds. What is the background radiation, in counts per minute? A. 6000 cpm B. 2 cpm C. 100 cpm D. 1.67 cpm Which of the following graphs correctly represents Ohm s Law, where V is the voltage and I the current?

Explanation / Answer

4. (d)

5. 500 pulse/300 sec *60 = 100 cpm

ans. is (c)

6. we know that V = IR

hence ans. is (B)

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