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Physics Past Questions and Answers

Neco Physics Questions

Question 56:

The magnetic effect of a current-carrying coil is NOT utilized in the making of a/an ____________

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A Carbon microphone
B Electric bells
C Magnetic relay
D Telephone earpiece
E Thermostat

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Question 57:

In 24 days a radioactive isotope decreases in mass from 128g to 2g. What is the half-life of the radioactive material?

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A 2.54 days
B 4.00 days
C 4.80 days
D 6.00 days
E 8.00 days

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Question 58:

The invisible part of the spectrum of white light consists of ____________

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A Infra-red and ultra-violet only
B Infra-red, ultra-violet and blue only
C Red, orange and green only
D Red and violet only
E Yellow and indigo only

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Question 59:

50cm³ of air at a pressure of 5Nm^-2 is enclosed in a metal tube by a piston. If the piston is pushed in a distance of 10cm, what will the pressure of the air become, if the cross-sectional area of the tube is 2cm^-2? (Assume that the temperature remains constant throughout)

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A 12.5 Nm^-2
B 8.7 Nm^-2
C 8.3 Nm^-2
D 3.8Nm^-2
E 3.0Nm^-2

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Question 60:

Which scientist discovered natural radioactivity?

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A Enrico Fermi
B Henri Becquerel
C Marie Curie
D Micheal Faraday
E Niels Bohr

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