Ejercicios De Circuitos Electricos (Ingles)

TEST : CIRCUITOS ELECTRICOS 1 NOMBRE : CARLOS ROBERTO HIDROBO

1. Use your understanding of equivalent resistance to complete the following statements:

a. Two 3-[pic] resistors placed in series would provide a resistance that is equivalent to one _____-[pic] resistor.

b. Three 3-[pic] resistors placed in series would provide a resistance that is equivalent to one_____-[pic] resistor.

c. Three 5-[pic] resistors placed in series would provide a resistance that is equivalent to one _____-[pic] resistor.

d. Three resistors with resistance values of 2-[pic] , 4-[pic] , and 6-[pic] are placed in series. These would provide a resistance that is equivalent to one _____-[pic] resistor.

e. Three resistors with resistance values of 5-[pic] , 6-[pic] , and 7-[pic] are placedin series. These would provide a resistance that is equivalent to one _____-[pic] resistor.

f. Three resistors with resistance values of 12-[pic] , 3-[pic] , and 21-[pic] are placed in series. These would provide a resistance that is equivalent to one _____-[pic] resistor.

 

 
 

 

2. As the number of resistors in a series circuit increases, the overall resistance __________(increases, decreases, remains the same) and the current in the circuit __________ (increases, decreases, remains the same).

 
 

3. Consider the following two diagrams of series circuits. For each diagram, use arrows to indicate the direction of the conventional current. Then, make comparisons of the voltage and the current at the designated points for each diagram.

[pic]
 

 
 

 4. Three identical light bulbs are connected to a D-cell as shown at the right. Which one of the following statements is true?

a. All three bulbs will have the same brightness.
b. The bulb between X and Y will be the brightest.

c. The bulb between Y and Z will be the brightest.

d. The bulb between Z and the battery will be the brightest.

 

 
 

 

5. Three identical lightbulbs are connected to a battery as shown at the right. Which adjustments could be made to the circuit that would increase the current being measured at X? List all that apply.

a. Increase the resistance of one of the bulbs.
b. Increase the resistance of two of the bulbs.

c. Decrease the resistance of two of the bulbs.

d. Increase the voltage of the battery.

e. Decrease the voltage ofthe battery.

f. Remove one of the bulbs.

 

 
 

 

6. Three identical light bulbs are connected to a battery as shown at the right. W, X,Y and Z represent locations along the circuit. Which one of the following statements is true?

a. The potential difference between X and Y is greater than that between Y and Z.
b. The potential difference between X and Y is greater than thatbetween Y and W.

c. The potential difference between Y and Z is greater than that between Y and W.

d. The potential difference between X and Z is greater than that between Z and W.

e. The potential difference between X and W is greater than that across the battery.

f. The potential difference between X and Y is greater than that between Z and W.

 

 
 

 

7. Compare circuit Xand Y below. Each is powered by a 12-volt battery. The voltage drop across the 12-ohm resistor in circuit Y is ____ the voltage drop across the single resistor in X.

a. smaller than
b. larger than

c. the same as

 

 
 

 

8. A 12-V battery, a 12-ohm resistor and a light bulb are connected as shown in circuit X below. A 6-ohm resistor is added to the 12-ohm resistor and bulb tocreate circuit Y as shown. The bulb will appear ____.

a. dimmer in circuit X
b. dimmer in circuit Y

c. the same brightness in both circuits

 

 
 

 

9. Three resistors are connected in series. If placed in a circuit with a 12-volt power supply. Determine the equivalent resistance, the total circuit current, and the voltage drop across and current at each resistor.

[pic]
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