Oxidation of the filament in a light bulb is prevented by the introduction of
hydrogen
oxygen
argon
mercury vapour
Correct answer is C
No explanation has been provided for this answer.
3.63 x 10-19m
6.51 x 10-9m
4.24 x 10-8m
7.25 x 10-8m
Correct answer is C
\(\lambda = \frac{hc}{\frac{1}{2}mv^2} = \frac{6.6 \times 10^{-38} \times 3 \times 10^8}{\frac{1}{2} \times 9.1 \times 10^{-31} (2 \times 10^6)^2}\)
= 4.24 x 10-8m
250kHz
750kHz
1000kHz
2000kHz
Correct answer is D
No explanation has been provided for this answer.
E = \(\frac{1}{2} LI^2\)
E = LI2
E \(\frac{1}{2}LI\)
E = \(\frac{1}{2} L^2I\)
Correct answer is B
No explanation has been provided for this answer.
like poles facing each other and the keepers placed between them
like poles facing each other and the keepers placed between them
unlike poles facing each other and the keepers placed at their ends
unlike poles facing each other and the keepers placed between them
Correct answer is C
No explanation has been provided for this answer.