Quiz Friday on basic circuits taken from homework and class work

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Presentation transcript:

Quiz Friday on basic circuits taken from homework and class work Test next Friday Covering through electric circuits. Practice exams are posted.

When two resistances are connected in series, the total resistance a. is greater than the larger resistance. b. is less than the smaller resistance. c. is an inverse square relationship. d. is directly proportional to the squares of the individual resistances. e. is directly proportional to the square root of the sum of the squares of the individual resistances.

When two resistances are connected in parallel, the total resistance a. is greater than the larger resistance. b. is less than the smaller resistance. c. is an inverse square relationship. d. is directly proportional to the squares of the individual resistances. e. is directly proportional to the square root of the sum of the squares of the individual resistances.

1) Three 11. 0 Ω resistors are connected in series with a 24 1) Three 11.0 Ω resistors are connected in series with a 24.0 V battery. Find the following. (a) the equivalent resistance of the circuit (b) the current in each resistor

1) Three 11. 0 Ω resistors are connected in parallel across the 24 1) Three 11.0 Ω resistors are connected in parallel across the 24.0 V battery. Find the following. (a) the equivalent resistance of the circuit (b) the current in each resistor

2) Calculate the current in each resistor in the circuit below if a potential difference of 30.0 V is applied to the circuit. R is 20 ohms.

1 = 2 = 3 1 = 2 > 3 1 = 2 < 3

Compare the brightness of each bulb. a. 1 and 2 are the brightest b. 3,4,5 and 6 are the brightest c. 7 and 8 are the brightest d. They are all the same

The circuit contains four identical light bulbs in series with an ideal battery. A wire is then attached to points B and E. Lamp 1 Gets brighter Gets dimmer Stays the same Goes out completely

A wire is attached to points C and E more current is drawn from the battery less current is drawn from the battery the same current is drawn from the battery

A wire is attached to points C and E the voltage across only lamp 1 increases the voltage across lamps 3 and 4 increases the voltage across lamp 2 decreases the voltage across lamps 1 and 2 increases

A wire is attached to points C and E the power delivered by the battery increases the power dissipated by the circuit decreases the power delivered by the battery remains unchanged the power dissipated by the circuit is halved