Physics exams

Wednesday, 7 September 2011

PCAT Physics Practice test 2 & answer key

1)witch one is Balmer series ?
 A.$1/\lambda=R(1/1^{2}-1/2^{2})$
 B.$1/\lambda=R(1/2^{2}-1/2^{2})$
 C.$1/\lambda=R(1/3^{2}-1/2^{2})$
 D.$1/\lambda=R(1/4^{2}-1/2^{2})$

2)we have one wave with wavelength $\lambda= 6000 A$ ,find the frequency of this wave?

 A.$10^{13}$
 B.$5.10^{14}$
 C.$5.10^{15}$
 D.$6.10^{15}$

3) what is the value of energy for free particule?

 A.  E<-10 e.v
 B . E=-10 e.v
 C. E=-13.6 e.v
 D. E>= 0  e.v

No comments:

Post a Comment