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Physics 2021 WAEC Past Questions

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26

Determine the speed of the wave.   

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  • A.  64 cm/s 
  • B.  32 cm/s    
  • C. 24 cm/s   
  • D. 72 cm/s
View Answer & Discuss (9) WAEC 2021
27

Which of the following curved surfaces will produce a real image? I. Concave mirror II. Convex mirror III. Diverging lens IV. Converging lens    

  • A.   I and III only     
  • B.   I, II and IV only   
  • C.     II, III and V only         
  • D. II and IV only
View Answer & Discuss (6) WAEC 2021
28

The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.     

  • A.  (3.7, 7.4)        
  • B. (6.2, 9.9)   
  • C.   (2.5, -4 .8).     
  • D. (14.7, 1.4)
View Answer & Discuss (1) WAEC 2021
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29

Which of the arrangements of radiations below shows decreasing order of wavelengths?   

  • A.   X-rays> radio waves > infrared radiations     
  • B. Radio waves> infrared radiations > X-rays     
  • C. Infrared radiations > radio waves > X-rays   
  • D.  X-rays> infrared radiations > radio waves
View Answer & Discuss (1) WAEC 2021
30

An electric pressing iron is connected to the mains using an insulated wire. wire becomes very hot.

The heat generated in the wire can be minimized by replacing the wire with one of?

 

  • A.  thinner insulation.     
  • B.  greater diameter.      
  • C. smaller diameter.       
  • D. thicker insulation.
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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