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Physics Past Questions

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146 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10
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Past Questions

146 questions
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Question 1 of 6 146 total questions
Question 71
jamb 2004

A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30o deflection. The sensitivity of the instrument is

A33.0
B0.1
C90.0
D10.0
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Question 72
jamb 2004

X rays can be used in the study of crystal structure because they

Ahave a very long-reaching wavelength
Bhave extremely short wavelength
Care invisible
Dare very fast
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Question 73
jamb 2004

For semi conductor to have negative temperature coefficient of resistance implies that

Atheir resistance decrease with temperature
BThe resistance increase with temperature
Ctheir resistance is constantly changing with temperature
Dthey have electrons and holes at high temperature
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Question 74
jamb 2004
An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is
A1.4A
B1.2A
C12.0A
D14.0A
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Question 75
jamb 2004

A radioisotope has a decay constant of 10\(^{-7}\)s\(^{-1}\). The average life of the radioisotope is

A1.00 x 107s
B6.93 x 106s
C1.00 x 10-7s
D6.93 x 107s
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Question 76
jamb 2004

A generator manufacturing company was contracted to produce an a.c dynamo but inadvertently produced a d.c dynamo. To correct this error, the

Aarmature coil should be made of silver
Bcommutator should be replaced with slip ring
Ccommutator should be replaced with split rings
Darmature coil should be made of aluminium
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