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  • Question
  • When these numbers are multiplied, (6 × 103) (5 × 105), the result is


  • Options
  • A. 3 × 108
  • B. 30 × 108
  • C. 300 × 109
  • D. 3,000 × 107

  • Correct Answer
  • 30 × 108 


  • Quantities and Units problems


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    • 1. When these numbers are added, (87 × 105) + (2.5 × 106), the result is

    • Options
    • A. 1.12 × 104
    • B. 11.2 × 105
    • C. 112 × 105
    • D. 1,120 × 106
    • Discuss
    • 2. The number of millivolts in 0.06 kilovolts is

    • Options
    • A. 600 V
    • B. 6,000 mV
    • C. 60,000 mV
    • D. 600,000 mV
    • Discuss
    • 3. Seven thousand volts can be expressed as

    • Options
    • A. 7 kV
    • B. 7 MV
    • C. 7 mV
    • D. either 7 kV or 7 mV
    • Discuss
    • 4. The quantity 3.3 × 103 is the same as

    • Options
    • A. 330
    • B. 3,300
    • C. 33,000
    • D. 0.0033
    • Discuss
    • 5. Eighteen thousand watts is the same as

    • Options
    • A. 18 mW
    • B. 18 MW
    • C. 18 kW
    • D. 18 µW
    • Discuss
    • 6. The number 65,000 expressed in scientific notation as a number between 1 and 10 times a power of ten is

    • Options
    • A. 0.65 × 104
    • B. 6.5 × 104
    • C. 65 × 104
    • D. 650 × 103
    • Discuss
    • 7. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

    • Options
    • A. 8.2 kΩ
    • B. 820 Ω
    • C. 8.2 Ω
    • D. 82 Ω
    • Discuss
    • 8. When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is

    • Options
    • A. 14.4 V
    • B. 1.4 V
    • C. 100 V
    • D. 10 V
    • Discuss
    • 9. A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.

    • Options
    • A. 40 Ω
    • B. 4 Ω
    • C. 2 Ω
    • D. 20 Ω
    • Discuss
    • 10. What is the voltage source for a circuit carrying 2 A of current through a 36 Ω resistor?

    • Options
    • A. 1.8 V
    • B. 18 V
    • C. 7.2 V
    • D. 72 V
    • Discuss


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