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Post Utme Ladoke Akintola University of Technology Physics Past Questions and Answers

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Post Utme Ladoke Akintola University of Technology Physics Past Questions

Question 6:


Which of the following is a mechanical wave?

A. Micro wave
B. Water wave
C. )-ray
D. Infra-red ray


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Question 7:


The half-life of the radioactive substance of mass 100g is 30 minutes. What fractiods of the onginal mass is left over after 3hrs ?

A. 3.125
B. 6.25
C. 1.5625
D. 0.02563


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Question 8:


Two resistors 12Ω and 8Ω are connected in parallel, if the power developecin 12%, resistor is 6w, determine the power developed in 3.32 resistor.

A. 9w
B. 12w
C. 16w
D. 24w


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Question 9:


How long will a 60 wart element take to heat water of mass 9.5kg at 20C to 90C. Neglect heat loss (S.H. C. of water =4200jkg1K1 )

A. 350 secs
B. 1260 secs
C. 2100secs
D. 1500 secs


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Question 10:


The critical angle of glass is 42, the approxiffate refractive tho dex of this glass is

A. 1.50
B. 1.38
C. 1.80
D. 2.30


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