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1421

Which of the following correctly explains why soft iron is proffered to steel in electromagnets? i. soft iron is more readily magnetized than steel. ii. soft iron is more readily demagnetized than steel. iii. soft iron retains magnetism more than steel.

  • A. i only
  • B. ii and iii only
  • C. i and ii only
  • D. i, ii, and iii.
View Answer & Discuss (7) JAMB 1993
1422
A current carrying conductor experiences a force when placed in a magnetic field because the
  • A. conductor is magnetized
  • B. magnetic field of the current interacts with external magnetic field
  • C. force is due to the motor principle
  • D. electric field of the current interacts with the external magnetic field
View Answer & Discuss (4) JAMB 1993
1423
A simple cell with mercury-amalgamated zinc electrode prevents
  • A. local actions
  • B. polarization
  • C. buckling
  • D. degradation
View Answer & Discuss (4) JAMB 1993
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1424
The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is
  • A. 0.5 \(\Omega\)
  • B. 1.0\(\Omega\)
  • C. 2.0\(\Omega\)
  • D. 4.0\(\Omega\)
View Answer & Discuss (20) JAMB 1993
1425
A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is
  • A. 200C
  • B. 50C
  • C. 12C
  • D. 0.002C
View Answer & Discuss (3) JAMB 1993
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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