Test of physics chap 19 20 21 for MCAT
1)corpuscular theory of light is proposed by
A)maxwell
B)newton
C)hugen
D)none
2)when photon travels from one medium to other its frequency
A)increase
B)decrease
C)unchangee
D)all
3)the frequency of photon who's energy is 75ev is
A)18×10^10 hz
B)18×10^15hz
C)0
D)10
4)if n number of photons are striking on a metal surface the totall momentum will
A)2h•lmda
B)nh/lmda
C)both
D)none
5)gamma rays produced due to
A)nuclear de-excitation
B)atomic de-excitation
C)both
6)metal plate work function 4 discovery of x-rays should be
A)high
B)moderate
C)low
7)in G.M counter size of pulse is
A)depond on energy of particale
b)independant of energy of size particle
C)both
D)none
8)which one has more ionization power
A)alpha rays
B)gamma rays
c)beta rays
9)Ra has atomic mass 228 nd atomic no 88 nd decays 3 alpha 1 beta particle than mass nd atomic no of Ra
A)216/83
B)220/85
C)224/80
D)216/78
10)after 5 half lives ofvradioactive element undecayed% will be
A)3.1%
B)4%
C)5%
d)6.6%
11)paschen series lies in
A)U.v region
B)infrared region
C)Visible region
12)penetration power of x-rays by decreasing wavelengty
A)decrease
B)same
C)increase
13)1 curie=
A)3.7×10^6 dis/sec
B)3.7×10^7dis/sec
C)both
14)alpha decay occur when size of nucleus is
A)small
b)large
C)not matter
15)not experienced strong force so particle is
A)hydrons
B)laptons
C)mesons
Please comment your answers
1)corpuscular theory of light is proposed by
A)maxwell
B)newton
C)hugen
D)none
2)when photon travels from one medium to other its frequency
A)increase
B)decrease
C)unchangee
D)all
3)the frequency of photon who's energy is 75ev is
A)18×10^10 hz
B)18×10^15hz
C)0
D)10
4)if n number of photons are striking on a metal surface the totall momentum will
A)2h•lmda
B)nh/lmda
C)both
D)none
5)gamma rays produced due to
A)nuclear de-excitation
B)atomic de-excitation
C)both
6)metal plate work function 4 discovery of x-rays should be
A)high
B)moderate
C)low
7)in G.M counter size of pulse is
A)depond on energy of particale
b)independant of energy of size particle
C)both
D)none
8)which one has more ionization power
A)alpha rays
B)gamma rays
c)beta rays
9)Ra has atomic mass 228 nd atomic no 88 nd decays 3 alpha 1 beta particle than mass nd atomic no of Ra
A)216/83
B)220/85
C)224/80
D)216/78
10)after 5 half lives ofvradioactive element undecayed% will be
A)3.1%
B)4%
C)5%
d)6.6%
11)paschen series lies in
A)U.v region
B)infrared region
C)Visible region
12)penetration power of x-rays by decreasing wavelengty
A)decrease
B)same
C)increase
13)1 curie=
A)3.7×10^6 dis/sec
B)3.7×10^7dis/sec
C)both
14)alpha decay occur when size of nucleus is
A)small
b)large
C)not matter
15)not experienced strong force so particle is
A)hydrons
B)laptons
C)mesons
Please comment your answers
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