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IB Circuits

 

page 1

1. Which of the following answers gives the ideal characteristics for voltmeters and ammeters?
Voltmeter
Ammeter
A.
Infinite resistance
Infinite resistance
B.
Zero resistance
Infinite resistance
C.
Infinite resistance
Zero resistance
D.
Zero resistance
Zero resistance

2. Which of the following graphs shows the resistance characteristics for a filament lamp?

 

3. A student connects 12 x 1.5V cells in a variety of arrangements. Which one of these will have a total e.m.f. of  6V?
A battery of e.m.f. 12V is connected to a resistor. 120C of charge flows through the resistor in one minute and transfers 1200J of electrical energy to the resistor.

4. What is the current flowing?

  • A. 0.5A
  • B. 2A
  • C. 10A
  • D. 1440A

5. What is the terminal voltage of the cell?

  • A.2V
  • B.6V
  • C.10V
  • D. 12V

6. What is the internal resistance of the cell?

  • A. 1Ω
  • B. 2Ω
  • C. 4Ω
  • D. 10Ω

7. What is the power dissipated in the resistor?

  • A.10W
  • B.20W
  • C.24W
  • D. 144W

8. A circuit is set up to investigate the I-V characteristics of a bulb. Which of these shows the correct arrangement of the components?

9. A resistor is rated as 0.5Ω, 8W. What is the maximum p.d. that can be applied? 

  • A. 1V
  • B. 2V
  • C. 4V
  • D. 8V

10. A diode is connected to a circuit to record the current and p.d. across it. The following readings were obtained:
V=1V, I= 0.1A  ;  V= 2V, I=0.5A.
The current increases by 0.4A when the voltage increases by 1V.


What is the resistance of the diode when I=0.5A?

  • A. 1 Ω
  • B. 2.5 Ω
  • C. 4 Ω
  • D. 5 Ω

These 4 resistor networks are made using identical resistors.

11. Which network has the highest resistance?

12. Which network would have the largest current flowing through it when connected to identical cells?

 

13. The power supply voltage in this circuit is slowly increased. Which fuse would blow first?

14. 2 resistors of resistance R are connected in parallel with a cell of e.m.f. E and negligible internal resistance. The total power dissipated in the resistors is P. What would be the total power dissipated if the resistances have a value of 2R and the cell has an e.m.f. of 2E?

  • A. ½ P
  • B. P
  • C. 2P
  • D. 4P

15. Which of these statements is the definition of a volt?

  1. The p.d. required to produce a current of 1A through a 1 Ω resistor
  2. The p.d. required to transfer 1J of electrical energy per coulomb
  3. The work done per unit charge
  4. The current through a unit resistance