Presentation on theme: "ConcepTest 1 Series Resistors I"— Presentation transcript:
1ConcepTest 1 Series Resistors I 1) 12 V2) zero3) 3 V4) 4 V5) you need to know the actual value of RAssume that the voltage of the battery is 9 V and that the three resistors are identical. What is the potential difference across each resistor?9 V
2ConcepTest 2 Series Resistors II 1) 12 V2) zero3) 6 V4) 8 V5) 4 VIn the circuit below, what is the voltage across R1?12 VR1= 4 WR2= 2 W
3ConcepTest 3 Parallel Resistors I 2) zero3) 5 A4) 2 A5) 7 AIn the circuit below, what is the current through R1?10 VR1= 5 WR2= 2 W
4ConcepTest 4 Parallel Resistors II 1) increases2) remains the same3) decreases4) drops to zeroPoints P and Q are connected to a battery of fixed voltage. As more resistors R are added to the parallel circuit, what happens to the total current in the circuit?
5ConcepTest 5 Short Circuit 1) all the current continues to flow through the bulb2) half the current flows through the wire, the other half continues through the bulb3) all the current flows through the wire4) none of the aboveCurrent flows through a lightbulb. If a wire with no resistance is now connected across the bulb, what happens?
6ConcepTest 6 Short Circuit II 1) glow brighter than before2) glow just the same as before3) glow dimmer than before4) go out completely5) explodeTwo lightbulbs A and B are connected in series to a constant voltage source. When a wire is connected across B, bulb A will:
7ConcepTest 7 Circuits IThe lightbulbs in the circuit below are identical with the same resistance R. Which circuit produces more light? (brightness power)1) circuit 12) circuit 23) both the same4) it depends on R
8ConcepTest 8 Circuits II 1) twice as much2) the same3) 1/2 as much4) 1/4 as much5) 4 times as muchThe three lightbulbs in the circuit all have the same resistance of 1 W . By how much is the brightness of bulb B greater or smaller than the brightness of bulb A? (brightness power)10 VABC
9ConcepTest 9 More Circuits I What happens to the voltage across the resistor R1 when the switch is closed? The voltage will:1) increase2) decrease3) stay the sameVR1R3R2S