Physics WAEC Past Questions

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1451

How many beta particle(s) are emitted in the radioactive decay of \(^{198}_{79}Au \leftarrow ^{198}_{80}Hg\)?

A. 1
B. 2
C. 3
D. 5

View Answer & Discuss (1) WAEC 2016

1452

The phenomenon by which two light atomic nuclear combine to form a heavy nuclide with the release of energy is known as

A. radioactivity
B. nuclear fusion
C. nuclear fission
D. chain reaction

View Answer & Discuss (4) WAEC 2016

1453

In a p-type semiconductor, the?

A. number of holes are equal to the number of electrons
B. electrical resistivity increases
C. electrons are the majority charge carriers
D. holes are the majority charge carriers

View Answer & Discuss (2) WAEC 2016

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1454

Let \(\Delta\)x be the uncertainty in the measurements of position and \(\Delta\)p the uncertainty in measurement of momentum. The uncertainty principle relation is given as

A. \(\Delta\)x . \(\Delta\)p = h
B. \(\Delta\)x . \(\Delta\)p \(\leq\) = h
C. \(\Delta\)x . \(\Delta\)p \(\geq\) = h
D. \(\Delta\)x . \(\Delta\)p > h

View Answer & Discuss (3) WAEC 2016

1455

Two angles of a pentagon are in the ratio 2:3. The others are 60^o each. Calculate the smaller of the two angles

A. 72^o
B. 100^o
C. 120^o
D. 144^o

View Answer & Discuss (2) WAEC 2015

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