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16

The diagram above is an illustration of an a.c. circuit.Calculate the reactance of the capacitor. 

 

 

 

  • A. 2016Ω    
  • B. 2000Ω      
  • C. 200Ω    
  • D. 4000Ω
View Answer & Discuss (5) WAEC 2021
17

A galvanometer with a full-scale deflection of 20 mA is Converted to read 8 K by connecting a 395 \(\Omega\) resistor in series with it. Determine the internal resistance of the galvanometer

  • A. 2.5\(\Omega\)
  • B. 5.0\(\Omega\)
  • C. 8.0\(\Omega\)
  • D. 10.0\(\Omega\)
View Answer & Discuss WAEC 2022
18

When the plate area of a capacitor increases?

  • A. the voltage can withstand increase
  • B. the capacitance decreases
  • C. the capacitance is unaffected
  • D. the capacitance increases
View Answer & Discuss (1) JAMB 2022
WAEC offline past questions - with all answers and explanations in one app - Download for free
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
19

A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?

  • A. 2400 J
  • B. 9600 J
  • C. 1500 J
  • D. 1200 J
View Answer & Discuss JAMB 2022
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC offline past questions - with all answers and explanations in one app - Download for free