critical energy
ionization energy
work function
planck's constant
Correct answer is C
No explanation has been provided for this answer.
5.56 x 1019Hz
1.66 x 1019Hz
1.12 x 1015Hz
8.42 x 1014Hz
Correct answer is C
F = \(\frac{K.E + Wo}{h}\)
= \(\frac{3.0 \times 1.6 \times 10^{-19} + 2.56 \times 106{-19}}{6.6 \times 106{-34}}\)
- 1.12 x 10-15HZ
6.3A
33.3A
37.2A
40.0A
Correct answer is A
XL = \(2\pi f L\)
= = 2 x 3.142 x 50 x 0.12
= 37.68\(\Omega\)
Z = \(\sqrt{R^2 + X_L^2} = \sqrt{4^2 + 37.68^2}\)
I = \(\frac{V}{z} = \frac{240}{37.89}\)
= 6.3A
Which of the following devices does not makes use of eddy current for its action? A/An
galvanometer
speedometer
induction furnace
speedometer
Correct answer is A
No explanation has been provided for this answer.
The capacitance of parallel plates capacitors varies
inversely as the square of the distance between the plates
directly as the square of the distance between the plates
inversely as the distance between the plates
directly as the distance between the plate
Correct answer is A
No explanation has been provided for this answer.