Which of the following is TRUE of the particles emitted in radioactive disintegration?
the beta particle is the helium nucleus H
the alpha particle is lighter than the beta particle
the alpha particle is deflected more than the beta particle in a magnetic field
the beta particle is deflected more than the alpha particle in a magnetic field
Correct answer is D
No explanation has been provided for this answer.
intensity of the radiation
source of the radiation
wavelength of the radiation
detection device of the electron
Correct answer is C
The maximum kinetic energy of an emitted electrons is independent of the intensity of the incident light but proportional to the frequency ( wavelength) of incident light. increasing the intensity of light only increases the number of photo-electrons
6000A
100A
10A
1A
Correct answer is B
m = Itz \(\Rightarrow\) I = m = \(\frac{36}{5\times 60 \times 0.0012}\)
= 100A
400mA
450mA
500mA
550mA
Correct answer is A
V = 0.1 x 50 x 10-3 = 5 x 10-3volts
RT = \(\frac{0.1 \times 0.0111}{0.1 + 0.0111}\)
= 9.99 x 10-3\(\Omega\)
V = IR \(\Rightarrow\) I
= \(\frac{5 \times 10^{-3}}{9.9 \times 10^{-3}}\)
= 0.5A ; = 500mA
A calibrated potentiometer is used to measure the e.m.f. of a cell because the
internal resistance of a cell is small compared with that of the potentiometer
potentiometer has a linear scale
potentiometer takes no current from the cell
resistance of the potentiometer is less than that of a voltmeter
Correct answer is C
No explanation has been provided for this answer.