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Physics 2004 JAMB Past Questions

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16
If 16mA of current flows through a conductor in one second, the number of electron transported per seconds is
[1 electronic charge = 1.6 x 10-19C]
  • A. 1.00 x 1020
  • B. 2.56 x 10-18
  • C. 2.56 x -17
  • D. 1.00 x 1017
View Answer & Discuss (7) JAMB 2004
17

Electrical appliances at home are normally earthed so that?

  • A. the appliances are maintained at a lower p.d than the earth
  • B. both the a.c and d.c sources can be used
  • C. a person touching the appliances is safe from electric shock
  • D. the appliances are maintained at a higher p.d than the earth
View Answer & Discuss (4) JAMB 2004
18
Given three capacitors 0.3μF, 0.5μF and 0.2μF, the joint capacitance when arranged to give minimum capacitance is
  • A. 0.1μF
  • B. 0.3μF
  • C. 1.0μF
  • D. 0.5μF
View Answer & Discuss (11) JAMB 2004
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19

The difference between X-rays and gamma rays is that

  • A. x-rays are more penetrating than gamma rays
  • B. x-rays are electromagnetic radiations while gamma rays are negatively charged radiation
  • C. x-rays have higher frequencies than gamma rays
  • D. x-rays arise from energy changes in the electronic structure of atoms while gamma rays come from the nucleus
View Answer & Discuss (8) JAMB 2004
20
To protect a material from the influnce of an external magnetic field, the materials should be kept
  • A. square steel ring
  • B. triangular zinc ring
  • C. soft iron ring
  • D. loop of copper wire
View Answer & Discuss (6) JAMB 2004
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