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Physics 2021 WAEC Past Questions

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16

The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]

 

  • A. 2.00 x 10\(_{-3}\)H 
  • B.  1.59 x 10\(_{-3}\)H 
  • C.  1.09 x 10\(_{-3}\)H     
  • D. 6.28x 10\(_{-3}\)H
View Answer & Discuss (4) WAEC 2021
17

The diagram illustrates the velocity-time graph of a body. Calculate the distance covered by the body during the motion

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  • A. 15m
  • B. 84m
  • C. 72m
  • D. 48m
View Answer & Discuss (7) WAEC 2021
18

An atom that emits an a-particle?

 

  • A.  may become a different element.     
  • B.   becomes a different isotope of the element.     
  • C. daughter with increased mass. 
  • D.   becomes a daughter of a different element always.
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19

Which of the following units is equivalent to the unit of electric current?

  • A.  C s\({-1}\)   
  • B.    W   
  • C.  J s\({-1}\)      
  • D. C
View Answer & Discuss (2) WAEC 2021
20

A ball is swung in a horizontal circle of centre O with a constant speed. acceleration?

  • A. Away from O   
  • B.   Along the Circumference of the circle   
  • C. Toward centre O     
  • D. Along a tangent to the circle
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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709