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Author Question: A small bulb is rated at 7.5 W when operated at 125 V. Its resistance (in ohms) is a. 0.45. b. ... (Read 77 times)

vicotolentino

  • Hero Member
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  • Posts: 552
on: Jul 28, 2018
A small bulb is rated at 7.5 W when operated at 125 V. Its resistance (in ohms) is
 a. 0.45.
  b. 7.5.
  c. 17.
  d. 940.
  e. 2 100.

Question 2

How much energy is dissipated as heat during a two-minute time interval by a 1.5-kW resistor which has a constant 20-V potential difference across its leads?
 a. 58 J
  b. 46 J
  c. 32 J
  d. 72 J
  e. 16 J


b614102004

  • Sr. Member
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  • Posts: 320
Reply #1 on: Jul 28, 2018
Answer to Question 1

E

Answer to Question 2

C


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