Skip to content

Course home

Sign up

3 Conservation of energy

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
Question 38

An electric mixer receives the same input energy before and after a modification. Before the modification, the efficiency of the mixer is 60%. The modification reduces the energy dissipated by the mixer by 25% of its previous value.

What is the efficiency of the mixer after the modification?

[1]
A

85%85\%85%

B

70%70\%70%

C

75%75\%75%

D

30%30\%30%

Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

Question bank