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4321

The vacuum in a thermoflask reduces heat loss resulting from

  • A. radiation only
  • B. conduction and convection only
  • C. radiation and convection only
  • D. conduction only
View Answer & Discuss (1) WAEC 2019
4322

The diagram above represents an experimental set-up for verifying?

 

  • A. lens formula
  • B. refraction laws
  • C. reflection laws
  • D. mirror formula
View Answer & Discuss (9) WAEC 2019
4323

Which of the following statements about a moving object is correct?

  • A. When accelerating, the resultant force acting on it must be equal to zero.
  • B. There must always be a non-zero resultant force acting on it.
  • C. At a steady velocity, the resultant force acting on it must be equal to zero
  • D. At a steady velocity, the air resistance must be equal to zero.
View Answer & Discuss (1) WAEC 2019
WAEC offline past questions - with all answers and explanations in one app - Download for free
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
4324

If the efficiency of a transformer is 100%, which of the following equations would be correct? 
 

  • A. N\(_p\)E\(_p\) = N\(_s\)E\(_s\)
  • B. N\(_s\)I\(_p\)= N\(_p\)I\(_s\)
  • C. N\(_s\)I\(_s\) = N\(_p\)I\(_p\)
  • D. I\(_p\)E\(_s\) = I\(_s\)E\(_p\) 
View Answer & Discuss (2) WAEC 2019
4325

A freshly demagnetized bar magnet is placed in the East-West direction to ensure that

  • A. the molecular magnets remain randomly arranged. 
  • B. the molecular magnets are properly aligned
  • C. it is affected by the earth's magnetic field
  • D. the magnetic domains are within the earth's field
View Answer & Discuss (6) WAEC 2019
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
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