CH 23

When two or more different capacitors are connected in series across a potential source, which of the following statements must be true? (There could be more than one correct choice.) Check all that apply. A) The total voltage across the combination is the algebraic sum of the voltages across the individual capacitors. B) The equivalent capacitance of the combination is less than the capacitance of any of the capacitors. C) The potential difference across each capacitor is the same D) Each capacitor carries the same amount of charge. E) The capacitor with the largest capacitance has the most charge.

A,B,D

When two or more different capacitors are connected in parallel across a potential source (battery), which of the following statements must be true? (There could be more than one correct choice.) A) The potential difference across each capacitor is the same. B) Each capacitor carries the same amount of charge. C) The equivalent capacitance of the combination is less than the capacitance of any one of the capacitors. D) The capacitor with the largest capacitance has the largest potential difference across it. E) The capacitor with the largest capacitance has the most charge.

A,E

7)When unequal resistors are connected in parallel in a circuit, A) the same current always runs through each resistor. B) the potential drop is always the same across each resistor. C) the largest resistance has the largest current through it. D) the power generated in each resistor is the same.

B

A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the new RC circuit will be A) the same as before. B) larger than before. C) smaller than before. D) variable.

C

A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in parallel with the first one, the time constant of the new RC circuit will be A) the same as before. B) twice as large as before. C) three times a large as before. D) one-half as large as before. E) one-fourth as large as before.

C

Three identical capacitors are connected in parallel to a potential source (battery). If a charge of Q flows into this combination, how much charge does each capacitor carry? A) 3Q B) Q C) Q/3 D) Q/9

C

6)Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination? A) The equivalent resistance is equal to that of any one of the resistors. B) The equivalent resistance is equal to average of the four resistances. C) The equivalent resistance is less than that of the smallest resistor. D) The equivalent resistance is less than that of the largest resistor. E) The equivalent resistance is more than the largest resistance.

E

Three identical capacitors are connected in series across a potential source (battery). If a charge of Q flows into this combination of capacitors, how much charge does each capacitor carry? Q 3Q Q/9 Q/3

Q

Always true about simple parallel circuits Removing a bulb does not stop the current flow throughout the circuit. There is the same voltage across each bulb in the circuit.

Removing a bulb does not stop the current flow throughout the circuit. There is the same voltage across each bulb in the circuit.

What happens to the current supplied by the battery when you add an identical bulb in parallel to the original bulb? The current is cut in half. The current stays the same. The current becomes zero. The current doubles.

The current doubles.

Four unequal resistors are connected in a parallel with each other. Which one of the following statements is correct about this combination? The equivalent resistance is less than that of the smallest resistor. The equivalent resistance is more than the largest resistance. The equivalent resistance is equal to the average of the four resistances. The equivalent resistance is midway between the largest and smallest resistance. None of the other choices is correct.

The equivalent resistance is less than that of the smallest resistor.

Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination? The equivalent resistance is less than that of the smallest resistor. The equivalent resistance is equal to that of any one of the resistors. The equivalent resistance is less than that of the largest resistor. The equivalent resistance is more than the largest resistance. The equivalent resistance is equal to average of the four resistances.

The equivalent resistance is more than the largest resistance.

In a series circuit with two identical bulbs, what happens to the remaining bulb when one is replaced with a wire? The remaining bulb goes out. The remaining bulb maintains the same brightness. The remaining bulb gets dimmer. The remaining bulb gets brighter.

The remaining bulb gets brighter.

always true about simple series circuits

The same current flows through each bulb in the circuit. Adding a bulb makes the other bulbs dimmer Removing a bulb stops the current flow throughout the circuit..

As more resistors are added in series to a constant voltage source, the power supplied by the source increases. decreases. does not change. increases for a time and then starts to decrease.

decreases

When three resistors are combined in series, the total resistance of the combination is __________. the average of the individual resistance values greater than any of the individual resistance values less than any of the individual resistance values

greater than any of the individual resistance values

he lamps in a string of decorative lights are connected in parallel across a constant-voltage power source. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.) The other lamps get brighter equally. The brightness of the lamps will not change appreciably. The other lamps get brighter, but some get brighter than others. The other lamps get dimmer equally. The other lamps get dimmer, but some get dimmer than others.

the brightness of the lamps will not change appreciably

In an RC circuit, what is the name of the quantity represented by the symbol τ? the characteristic time the resistive component the Kirchoff the time constant the decay constant

the time constant