The particle that is responsible for the nuclear fission in a nuclear reactor is
neutron
proton
electron
photon
Correct answer is A
In a nuclear reaction, neutron is used as a bullet fired into 23592U, to trigger off nuclear chain reaction, which of course is controlled
hysteresis loss
eddy current loss
magnetic flux leakage
heating in the cells
Correct answer is B
No explanation has been provided for this answer.
8%
5%
3%
1%
Correct answer is C
After 5 half-lives, the fraction of any radio-active substance left = (1/2)5 = 1/32
Thus the percentage of the original nuclie = 1/32/1 x 100/1
assuming the original amount is unity percentage left
= 1/32 x 1400/1 = 3.12
The energy associated with the photon of a radio transmission at 3 x 105 Hz is
[h = 6.63 x 10-34Js]
2.00 x 10-28J
1.30 x 10-28J
2.00 x 10- 29J
1.30 x 10-29J
Correct answer is A
A photon of energy E = hf
= 6.63 x 10-34 x 3 x 105
= 19.89 x 10-29
= 2.0 x 10-28J
Pure silicon can be converted to a p-type by adding a controlled amount of
trivalent atoms
tetravalent atoms
pentavalent atoms
hexavalent atoms
Correct answer is A
No explanation has been provided for this answer.