Answer:
0.284 A
Explanation:
We are given that
Mass,m=0.246 kg
Potential difference,V=1.50 V
Efficiency=30.6%
Time,t=7.88 s
Initial speed=0
Speed,v=2.89 m/s
Kinetic energy=[tex]K.E=\frac{1}{2}mv^2[/tex]
Using the formula
[tex]K.E=\frac{1}{2}(0.246)(2.89)^2=1.027 J[/tex]
30.6% of Electric energy=K.E
[tex]E=\frac{K.E\times 100}{30.6}[/tex]
[tex]E=\frac{1.027\times 100}{30.6}=3.357 J[/tex]
[tex]E=VIt[/tex]
[tex]I=\frac{E}{Vt}=\frac{3.357}{1.5\times 7.88}[/tex]
[tex]I=0.284 A[/tex]
