Which is(are) true? Kirchhoff\'s second rule relates the sum of the around a clo

Question

Which is(are) true? Kirchhoff's second rule relates the sum of the around a closed loop in a circuit to the potential b. changes across all resistors and circuit elements c. implies conservation of energy in electric circuits d. Relates the currents entering and leaving any branch point in a circuit. e. all of the above f. two of the above g. none of the above The Hall effect a. provides empirical evidence that the charge carriers in metals are negative. b. can be used to determine the density of free electrons in a metal. c. both of the above d. neither of the above A resistor and an initially uncharged capacitor arranged in series are charged by a battery, which is connected at t = 0. The current in the circuit a. is constant because the emf supplied by the battery is constant. b. decreases exponentially in time. c. increases exponentially in time. d. There is no current because the elections cannot flow through the gap in the capacitor. Which statement(s) is (are) true? Ohm's law a. asserts that the current in a conducting wire is proportional to the resistance of the wire. b. is a general law of nature like Newton's laws, and Gauss' law. c. Describes the electrical properties of some conducting materials. d. all of the above e. two of the above

Explanation / Answer

1)

Kirchhoff's second rule is also called as voltage rule

It relates the emfs and also conservation of energy so the answer is

f) two of the above

2)

Hall effect gives the information of charge carriers and density of electrons

Answer is

c) both of the above

3)

initial current is zero and increases as time increases

Answer is

c) increases exponentially in time

4)

By Ohm's law we can find the types of materials

Answer is

c) Describes the electrical properties of some conducting materials

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