\(\frac{V_2}{I}\)
\(\frac{V_1}{I}\)
\(\frac{(V_1 + V_2)}{I}\)
\(\frac{(V_1 - V_2)}{I}\)
\(\frac{(V_2 - V_1)}{I}\)
Correct answer is E
On open circuit, V1 = I; On closed circuit V2 = IR + Ir
V2 = V1 + Ir
r = \(\frac{(V_2 - V_1)}{I}\)
33m
110m
220m
330m
495m
Correct answer is E
No explanation has been provided for this answer.
3
1.5
1.32
1
0.67
Correct answer is E
\(\alpha_1\)L1 = \(\alpha_2\)L2
\(\frac{L_1}{L_2}\) = \(\frac{\alpha_1}{1.5\alpha_2}\) (since a1- 1.5\(\alpha_2\))
\(\frac{L_1}{L_2}\) = 0.67
20g
25g
45g
50g
100g
Correct answer is A
Heat lost = heat gained
mc\(\theta\) = c\(\theta\) + mc\(\theta\)
m x 4.18 x (100 - 50) = 80(50 -25) + [20 x 4.18] x (50 - 25)
m = 20g
Which of the following elements is the best absorber of X-rays?
hydrogen
oxygen
calcium
copper
lead
Correct answer is E
No explanation has been provided for this answer.