Question

1)If one measures the current in series resistors, is the current measured before the resistors different than what measured between the two resistors?

a) no difference, current is the same

b) the difference depends on the direction of the current

c)the current after the first resistor will decrease

d) yes, they are different

If one measures the current in parallel resistors, are the currents in parallel resistors always the same?

a) no, only currents in series resistors are the same

b) the currents will be the same if one resistor has twice high resistance

c) no, they will be the same only when parallel resistors are of same resistance

d) yes, same current in parallel resistors

Which statement about the Kirchhoff's Junction rule is correct?

a) A junction in a circuit is a point where three or more conductors meet. The currents flow into a junction are always greater than those flow out of a junction.

b) A junction in a circuit is a point where any two conductors meet. The algebriac sum of the currents into and out of any junction is zero.

c) A junction in a circuit is a point where three or more conductors meet. The algebriac sum of the currents into and out of any junction is zero.

d) A junction in a circuit is a point where three or more conductors meet. The sum of the magnitudes of the currents into and out of any junction is zero.

Which statement about the Kirchhoff's loop rule is correct?

a) A loop is any closed path in a circuit. The algebraic sum of the potential differences across all resistors around any loop must be zero.

b) A loop is any closed path in a circuit. The algebraic sum of the potential differences around any loop must be zero.The potential differences include the potential differences across resistors and those associated with emf's.

c) A loop is any closed path in a circuit. The algebraic sum of the potential differences of all the emf's around any loop must be positive.

d) A loop is any closed path in a circuit. The algebraic sum of the potential differences around any loop must be zero.The potential differences across resistors are always negative and those associated with emf's are always positive.

Which of the following statement about application of Kirchhoff's rule is correct?

a) After applying Kirchhoff's rule, if your result for current is positive, that means the current is actually in the direction you assumed. If your result for current is negative, that means your calculation is wrong.

b) After applying Kirchhoff's rule, if your result for current is positive, that means the current is actually in the direction you assumed. If your result for current is negative, that means the current is actually in counterclockwise direction.

c) After applying Kirchhoff's rule, if your result for current is positive, that means the current is actually in the direction you assumed. If your result for current is negative, that means the current is actually in the opposite direction you assumed.

d) After applying Kirchhoff's rule, if your result for current is positive, that means the current is actually in the direction you assumed. If your result for current is negative, that means the current does not exist.

Answer 1

1) In series circuit, the current is same at all points. This, the correct option will be:

a) no difference, current is the same

2) In parallel, the current will be inversely proportional to the branch resistance. Thus if two branches have the same resistance, only then the current will be same. Thus, the correct option is:

c) no, they will be the same only when parallel resistors are of same resistance

3) A junction is:

c) A junction in a circuit is a point where three or more conductors meet. The algebriac sum of the currents into and out of any junction is zero

4) Loop:

b) A loop is any closed path in a circuit. The algebraic sum of the potential differences around any loop must be zero.The potential differences include the potential differences across resistors and those associated with emf's.

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