2001 - WAEC Physics Past Questions and Answers - page 5
41
In the circuit diagram above. Calculate the energy stored in the inductor at resonance
A
0.100J
B
0.050J
C
0.010J
D
0.005J
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42
Calculate the reactance of the inductor in the circuit diagram shown above [(\pi = \frac{22}{7})]
A
132\(\Omega\)
B
214\(\Omega\)
C
264\(\Omega\)
D
269\(\Omega\)
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43
Production of x-ray tube begins with
A
photo electric emission
B
collision of electrons
C
thermionic emission
D
field emission of electrons
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44
A nitrogen nucleus bombarded with an alpha particle produces an oxygen nucleus and a proton. The nuclear reaction for this process is (^4_2H + ^{14}2N \to ^{17}{8}O + ^1_1H + Q). Which of the following statements about the reaction is not correct?
A
the bombardment results into a nucleus with greater proton number
B
it is an induced nuclear reaction
C
it is a natural radioactive decay
D
the sum of the final nucleon numbers
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45
Electrons passing through crystals are diffracted because they
A
are repelled by the atoms in the crystal
B
are attracted by the atoms in the crystals
C
possess wave properties
D
are particles
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