Sunday, August 19, 2012

physics


A (P type) semiconductor is formed by adding impurities, which provide extra ____.

A. Electrons
B. Neutrons
C. Photons
*D. Holes 
 A student measures a current of .05 ampere through a P type semiconductor. If the battery connections are reversed, the current through the semiconductor will be? 

A. Less than .05 ampere
*B. Greater than .05 ampere 
C. The same

 What is the approximate bind energy of a helium nucleus that has a mass defect of 5.2 x 10-29 kilogram? 

A. 4.6 x 10+18 
B. 4.6 x 10-15 
*C. 4.7 x 10-12 
D. 4.7 x 10-18

No comments:

Post a Comment

Please add any Info about the MCATs that you think may be helpful to our readers. Thanks!