>PHYSICS

LADOKE AKINTOLA UNIVERSITY

2010

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1. D etermine the power in horse of a car that is exerting force of 5 x 10 5 N while moving at a constant speed of 10m/s.

A. 6khp

B. 7khp

C. 6.7khp

D. 7.6khp

2. T he frequency of a plane progressively were represented by the equation y = 4sin[200(22/7)t – 0.5t]

N:B 22/7 represents 'pi'

A. 100Hz

B. 100m/s

C. 1000m/s

D. 1000Hz

3. T he dimension of stress is

A.

ML -2

B.

ML -1 T -2

C.

ML -3 T -2

D.

ML 2 T -2

4. T he half life of a radioisotope is 92 seconds. The N/No left after 2 hours is

A. 54.22

B. 0.368

C. 650.59

D.3.0 x 10 -24

5. H ow much energy is stored in a 20-mH coil when it carries a current of 0.2A ?

A.5 x 10 4 J

B.10 x 10 -4 J

C.8 x 10 4 J

D.4 x 10 4 J

6. I f a radioactive material has a half life of 18days , what fraction of the radioactive nucleic will remain after 54 days?

A. 1/3

B. 3

C. 1/8

D. 8

7. W hat is the magnitude of the electric field at a field point 2m from a point charge of 4nC ?

A. 9Nc

B.9Nm -1

C.0.9NF -1

D.9Nc -1

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