The picture shows a loop of wire rotating in a magnetic field in a generator. Determine the direction of the current through the
load as the loop rotates from 180 to 270 degrees as shown in the picture.
A) From right to left
B) From left to right
C) There is not enough information to tell which direction the current will be in the circuit.
A) From right to left
B) From left to right
C) There is not enough information to tell which direction the current will be in the circuit.
2 answers:
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Answer:
240 ohms
Explanation:
From Ohms law we deduce that V=IR and making R the subject of the formula then R=V/I where R is resistance, I is current and V is coltage across. Substituting 120 V for V and 0.5 A for A then
R=120/0.5=240 Ohms
Alternatively, resistance is equal to voltage squared divided by watts hence
Explanation:
It is given that,
Total weight of the piston, W = F = 70 N
Area of the piston,
Let P is the pressure exerted on the piston by the gas. The force per unit area is called the pressure exerted pressure of the gas. Mathematically, it is given by :
We know that the atmospheric pressure is given by :
So, the pressure is given by :
Hence, this is the required solution.