Chareer IN Basic Eleceric cirewies MULTIPLE CHOICE Choose the one alternative th

Question

Chareer IN Basic Eleceric cirewies MULTIPLE CHOICE Choose the one alternative that best completes the statement eranswers the question. A 4-o meistar, an 8-omsister, and a 24-orsistor are eonnected together. What is the maximum resistance that ean be produoed using all three resibors? 1) 120 D 360 A 960 what is the connected together. 20 A 6 resistor, an 8-0 resistor, and a 24-o resistor are minimum resistance that can be produced using all three resistoest B) 40 connected in series with Two 40-o resisters are connected in parallel, and this combination of this combination 300. What is the effective resistance E)800 D) 500 A) 700 B) 1.20 4) A 20-0 resistor is in series with a combination of 40 600, and 120, what is the 4) parallel equivalent resistance D) 27 o B) 240 C) 1.80 A) 4.00 5) Three identical resistors are connected in parallel to a battery. If the current of 12. A flows from the battery, how much current flows through any one of the resistors? A) 4 A B) 36 A C) 12 A D) 18 A E) 6 A 6) Four resistors of 12, 30, 50, and 4 oo are connected in series. A 12-v battery is connected to the combination. What is the current through the battery? E) 1.0 A C 25 A B) 20 A A) 1.5 A Two 4. o resistors are connected in parallel, and this combination is connected in series with 3 What is the effective resistance of this combination? o. D) 120 C) 11. rallel with a 600 resistor. This combination is connected 8) A 30 o resistor is are connected to a 12. volt battery. How much power series with a 4.00 resistor. The resistors is dissipated in the 300 resistor? E) 27 W D 77 W C) 12 W B) 6 W A) 5.3 W FIGURE 18-16 13V BV 100 9) Refer to the portion of a circuit given in Fig. 18-16. What is the potential difference VA-vBif 9 E)55. V I 50 Amperes? CO 71. B) 35. V A) 63, v

Explanation / Answer

1) R123 = 4+8+24 = 36 ohms

correct option is (D)

2) 1/R = 1/6 +1/8 +1/24

R = 3 ohms

correct option is (E)

3) R12 = 4*4/(4+4) = 2 ohms

R123 = 2 + 3 = 5 ohms

correct option is (D)

4) 1/R234 = 1/4 +1/6 +1/12

R234 = 2 ohms

R1234 = 2+2 = 4 ohms

correct option is (A)

5) Req = R/3

V = 12*R/3

I1 = I2 = I3 =V/R = 12*R/3R = 4 A

correct option is (A)

6) R1234 = 12+3+5+4 = 24 ohms

V = 12 V

I = 12/24 = 0.5 A

correct otpion is (D)

7) R12 = 4*4/(4+4) = 2 ohms

R123 = 2+3 = 5 ohms

correct option is (E)

8)R12 = 3*6/(3+6) = 2 ohms

R123 = 2+3 = 5ohms

I123 = 12/5 = 2.4 A

in series combination current is constant

I12 = 2.4 A

V12 = 2.4*2 = 4.8 V

In parallel combinaiton voltage is constant

P1 = v1^2/R1 = 4.8^2/3 = 7.7 W

correct optin is (D)

VA - VB = 8 -10*5 -13 = -55 V

correct option is (E)

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