Answer:
B 5.0 A .
Explanation:
Hello.
In this case, since we know the charge (1200 C), time (4 min =240 s) and resistance (10Ω) which is actually not needed here, we compute the current as follows:
Then, for the given data, we obtain:
Therefore, answer is B 5.0 A .
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Answer:
the current is 15.68 × A
Explanation:
mass = 1000 kg
magnetic fied = 2T
rail separation = 2m
escape velocity is 11.2km/s = 11.2 × m/s
distance = 10 km = m
to find out
determine the current
solution
we know force F = I×L×B
here I is current and L is rail separation and B is magnetic field
so F = I ×2×2 = 4 I
so
acceleration is a =
a = m/s²
so equation of motion
v²-u² = 2 a S
here u is initial velocity and S is distance and a is acceleration and v is final velocity
11.2 × - 0 = 2×
×
solve we get I
I = 15.68 × A
so the current is 15.68 × A