When two identical batteries are connected in series, the total voltage of the c

Question

When two identical batteries are connected in series, the total voltage of the combination is a. the sum of the two voltages. b. equal to the voltage of one battery. c. the reciprocal of the sum of the reciprocals of the two voltages. 2. The electric current is a measure of the a. force exerted on the charges by the battery. b. amount of charge flowing through a wire each second. c. energy supplied by the battery each second. d. forces resisting the flow of charge through the circuit. 3. Which of the following does NOT affect the resistance of a wire? a. current b. type of metal c. length d. temperature 4. When resistors are connected in series, the resistances a. add. b. add as reciprocals. c. stay the same. d. are averaged. 5. What is the resistance of a 4-ohm resistor and a 12-ohm resistor connected in parallel? a.3 ohm b.4 ohm c.8 ohm d. 12 ohm e. 16 ohm

Explanation / Answer

1. a.sum of the two voltages

Whenever two batteries are connected in series, basically the voltages gets added up. The resultant value depends on the polarities of series connected batteries.

2. b.amount of charge flowing through wire each second.

electric current is time rate of flow of charges.

3. a.current

resistance of a wire depends on the length of the wire, the cross-sectional area of the wire, and the resistivity of the material composing the wire, temperature. If resistance is lower then flow of current is high.

4.a.add

Resistors connected in series gets added up. In parallel combination, it will be reciprocal of sum of individual reciprocals

5.Paralle combination resistors of 4 and 12 is
= 4 * 12/ (4+12)
= 48/16
= 3 ohms

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