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1) The load across a 12-V battery consists of a series combination of three resistances are 15 Ω, 21 Ω, and 24 Ω, respectively

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1) The load across a 12-V battery consists of a series combination of three resistances are 15 Ω, 21 Ω, and 24 Ω, respectively. What is the magnitude of the circuit current? 

A. 0.20 A

B. 5 A

C. 1260 A

D. 2 A

2. The load across a 50.0-V battery consists of a series combination of two lamps with resistances of 125Ω and 225 Ω. What is the total resistance of the circuit? 

A. 350 Ω

B. 100 Ω

C. 125 Ω

D. 225 Ω

3. 15.0-Ω resistor is connected in series to a 120-V generator and two 10.0-Ω resistors that are connected in parallel to each other. What is the total resistance of the load? 

A. 20 Ω

B. 10 Ω

C. 5 Ω

D. 15 Ω

4. The load across a 40-V battery consists of a series combination of three resistances R1, R2, and R3. R1 is 240 Ωand R3 is 120Ω. The potential difference across R1 is 24 V. What is the current in the circuit? 

A. 0.10 A

B. 10 A

C. 1 A

D. 2 A

5. The load across a 40-V battery consists of a series combination of three resistances R1, R2, and R3. R1 is 240 Ωand R3 is 120Ω. The potential difference across R1 is 24 V. What is the resistance of R2? 

A. 40 Ω

B. 400 Ω

C. 300 Ω

D. 360 Ω

 

6. 15.0-Ω resistor is connected in series to a 120-V generator and two 10.0-Ω resistors that are connected in parallel to each other. What is the magnitude of the circuit current? 

A. 6 A

B. 3 A

C. 8 A

D. 12 A

 

7. A small flashlight bulb draws 300mA from its 1.5V battery. What is the resistance of the bulb? 

A. 5Ω

B. 4Ω

C. 1Ω

D. 10Ω

8. The load across a 12-V battery consists of a series combination of three resistances are 15 Ω, 21 Ω, and 24 Ω, respectively. What is the total resistance of the load? 

A. 60 Ω

B. 36 Ω

C. 45Ω

D. 39 Ω

9. The load across a 40-V battery consists of a series combination of three resistances R1, R2, and R3. R1 is 240 Ωand R3 is 120Ω. The potential difference across R1 is 24 V. What is the equivalent resistance of the circuit 

A. 400 Ω

B. 360 Ω

C. 300 Ω

D. 40 Ω

10. An Automobile Headlight What is the resistance of an automobile headlight through which 2.50 A flows when 12.0 V is applied to it? 

A. 4.80 Ω

B. 0.21 Ω

C. 30 Ω

D. 0.48 Ω

11. The load across a 50.0-V battery consists of a series combination of two lamps with resistances of 125Ωand 225 Ω. What is the potential difference across the 125Ω lamp *

A. 17.9 V

B. 32.2 V

C. 50 V

D. 875 V

12. The load across a 50.0-V battery consists of a series combination of two lamps with resistances of 125Ωand 225 Ω. What is the current in the circuit?

A. 0.143 A

B. 7 A

C. 17500 A

D. 0.4 A

 

13. 15.0-Ω resistor is connected in series to a 120-V generator and two 10.0-Ω resistors that are connected in parallel to each other. What is the magnitude of the circuit current? What is the current in one of the 10.0Ω resistors? 

A. 3 A

B. 6 A

C. 12 A

D. 8 A

 

14. 15.0-Ω resistor is connected in series to a 120-V generator and two 10.0-Ω resistors that are connected in parallel to each other. What is the magnitude of the circuit current? What is the current in one of the 10.0Ω resistors?. What is the potential difference across the 15.0Ωresistor 

A. 90 V

B. 120 V

C. 60 V

D. 30 V