A resistor rated at 250 k Ω is connected across two D cell batteries (each 1.50 V) in series, with a total voltage of 3.00 V. Th
1 answer:
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Answer:
The value of current through the rod becomes half
Explanation:
As per Ohm's law we know that the current through a resistor is given as
here we know that
here we know that the length of the cylinder is L and area is A so the value of current through the rod is given as
now we have change the length of the conductor to twice of initial value and rest all parameters will remain the same
so we will have
now from above two equations we have
so new current will become
Answer:
The escape speed for the craft is 1.49 m/s.
Explanation:
In this case we need to find the escape speed for a craft launched from a space elevator at a height of 56,000 km. The escape velocity is given by :
Here,
G is universal gravitational constant
M is mass of earth
d = r + h, r is radius of Earth
So, the escape speed for the craft is 1.49 m/s.