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Physics Past Questions and Answers

Topic: Screw guage

Jamb Physics Questions - Screw guage

Question 6:
What is the reading of the vernier calipers shown above
  • A 1.79cm
  • B 1.73cm
  • C 1.39cm
  • D 1.34cm
View Answer & Explanation
Question 7:
In the calibration of an ammeter using faraday's laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes , the correction to be applied to the ammeter is
  • A 0.03A
  • B 0.04A
  • C 0.05A
  • D 0.06A
View Answer & Explanation
Question 8:
A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the
  • A Armature coil should be made of silver
  • B Commutator should be replaced with slip ring
  • C Commutator should be replaced with split rings
  • D Armature coil should be made of aluminium
View Answer & Explanation
Question 9:
A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the
  • A Armature coil should be made of silver
  • B Commutator should be replaced with slip ring
  • C Commutator should be replaced with split rings
  • D Armature coil should be made of aluminium
View Answer & Explanation
Question 10:
I. Diameter of a small ball bearing.
II. Thickness of a pieces of paper.
III. Diameter of a measuring cylinder.
IV. Length of a piece of wire.
Which of the above can be measured using a micrometer screw gauge?
  • A I, II and IV only .
  • B I and II only
  • C II and III only
  • D III and IV only
View Answer & Explanation