36.87o
53.13o
90o
136o
143.13o
Correct answer is B
\(\theta\) = cos-1\(\frac{(12)}{20}\)
\(\theta\) = 53.13°
3.84k Wh
7.20k Wh
8.40k Wh
12.00k Wh
14.56k Wh
Correct answer is B
Total power = (15 x 40) + 600
= 1200 watts
Energy(kWh) = \(\frac{1200}{1000}\) x 6
= 7.2 kwH
1.26 x 103Nm-2
3.3 x104Nm-2
1.35 x 104Nm-2
2.2 x 104Nm-2
105Nm-2
Correct answer is B
\(\frac{P_1V_1}{T_1}\) = \(\frac{P_2V_2}{T_2}\)
= \(\frac{\frac{1}{3} \times 1.4 \times 10^5}{-133 + 273}\) = \(\frac{P_2\times31}{37 +273}\)
P2 = 3.3 x 10
10cm
15cm
16cm
19cm
20cm
Correct answer is B
V = 3u, U = 10cm
therefore U = -ve,
F = \(\frac{UV}{U + V}\)
= \(\frac{10 \times (-30)}{10 - 30 }\)
= 15cm
0
\(\frac{1}{2}\)
2
8
32
Correct answer is D
E = Er x E0
16 = Er x 2
Er = 8