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1.7.1a Energy stores and energy transfers

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Question 2

A 120 W halogen lamp has an efficiency of 15%. A 25 W LED lamp has an efficiency of 80%.

Each lamp is switched on for the same amount of time.

Which lamp produces more light and which lamp converts more energy into other forms of energy?

A

Produces more light: LED lamp; Converts more energy into other forms: LED lamp

B

Produces more light: LED lamp; Converts more energy into other forms: Halogen lamp

C

Produces more light: Halogen lamp; Converts more energy into other forms: LED lamp

D

Produces more light: Halogen lamp; Converts more energy into other forms: Halogen lamp

Markscheme

1.7.1a Energy stores and energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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