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1591

An ammeter of resistance 1.0\(\Omega\) has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111\(\Omega\) is connected across its terminals.

  • A. 400mA
  • B. 450mA
  • C. 500mA
  • D. 550mA
View Answer & Discuss (19) JAMB 1989
1592
The electrochemical equivalent of silver is 0.0012gC-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be
  • A. 6000A
  • B. 100A
  • C. 10A
  • D. 1A
View Answer & Discuss JAMB 1989
1593

When a radiation strikes a metal surface, electrons may be ejected from the metal. The maximum kinetic energy which may be acquired by an ejected electron depend on the

  • A. intensity of the radiation
  • B. source of the radiation
  • C. wavelength of the radiation
  • D. detection device of the electron
View Answer & Discuss (14) JAMB 1989
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1594

Which of the following is TRUE of the particles emitted in radioactive disintegration?

  • A. the beta particle is the helium nucleus H
  • B. the alpha particle is lighter than the beta particle
  • C. the alpha particle is deflected more than the beta particle in a magnetic field
  • D. the beta particle is deflected more than the alpha particle in a magnetic field
View Answer & Discuss (10) JAMB 1989
1595
Eight alpha decays and six beta decays are necessary before an atom of 2 \(^{238}_{92}U\) achieves stability. The final product in the chain has an atomic number of
  • A. 70
  • B. 78
  • C. 82
  • D. 90
View Answer & Discuss (2) JAMB 1989
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