Physics 202 - Exam 2

what affect will add more light bulbs in parallel have upon the total current in a circuit

As more bulbs are connected in parallel, the current strength should increase because the overall resistance of the circuit decreases.

what does current refer to

Current is the rate at which electrons flow past a point in a complete electrical circuit.

the figure shows the three identical lightbulbs connected to a battery having a constant voltage across its terminals. What happens to the brightness of light bulbs 1 when the switch A is closed.

The brightness will decrease momentarily then return to its previous level

A 2 cell 2 bulb circuit is shown in the diagram. the two lightbulb are identical. several points are labeled around the circuit. How do the currents at Point B and D compare?

The current is the same at point B and D

what affect will adding more light bulbs in series have upon overall resistance of a circuit

The effect of adding a second bulb in series is to increase the overall resistance of the circuit. The resistance previously provided by the thin filament wire of just one bulb is now doubled due to the presence of two

in the circuit shown in the figure four identical resistors labeled A to D are connected to a battery as shown. S1 and S2 are switches. Which of the following actions would be result in the GREATEST amount of current through resistor A

The greatest amount of current through resistor 'a' would result if both switches S1 and S2 are closed

A light bulb is connected in the circuit shown in the figure with the switch S open. All the connecting leads to have no appreciable resistance and the battery has no internal resistance. When we close the switch which statements below accurately describe the behavior of the circuit.

a) The brightness of the bulb will increase d) potential drop across R2 has to decrease because

What are two types of observations which can be used to indicate flow rate?

Bulb brightness and compass deflection