All India Engineering / Architecture Entrance Examination (AIEEE)

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AIEEE 2009 Physics

Q.17. Two points P and Q are maintained at the potentials of 10V and – 4V, respectively. The work done in moving 100 electrons from P to Q is :

Sol:    
Answer: (1)

 Q.18. In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a- degree (= 0.50), then the least count of the instrument is:

1. half degree
   
   
2. one minute
   
   
3. half minute
   
   
4. one degree

Sol:   
 

Answer: (2)

 Q.19. The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is: (hc = 1240 eV.nm)

1. 1.68 eV
   
   
2. 3.09 eV
   
   
3. 1.41 eV
   
   
4. 1.51 eV

Sol:    

Answer: (3)

 Q.20. A particle has an initial velocity of  and an acceleration of  . Its speed after 10 s is:

1. 8.5 units
   
   
2. 10 units
   
   
3. 
   
   
4. 7 units

Sol:   
 

Answer: (3)

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