Complete Question
The question image is in the first uploaded image
Answer:
Explanation:
From the question we are told that
Distance b/w Q mid point and P is given as x
Generally the equation for magnitude of the electric field at the point P is given as
where
Therefore
Therefore equation for magnitude of the electric field at the point P is
<h2>
Answer: 45 N</h2>
Explanation:
The first Newton Law of Motion states that an object at rest or describing a uniform straight line motion (moving at constant velocity), will remain at rest or moving unless a force is applied to it and changes its state of rest or motion.
According to his law, an object in rest can be in equilibrium (net force equals to zero), and a moving object can also be in equilibrium, as long as it keeps a constant velocity.
So, in the case of the toy car the forces acting on it (considering there is equilibrium between the normal force and the weight of the toy) are:
F1=50 N in the direction of the movement of the car
F2=-5 N (in the opposite direction of the movement of the car, that s why it has the negative sign)
Therefore the net force F is:
F=F1+F2=50N - 5 N
F=45N
I would think phase... none of the others make sense
Answer:
Part a)
the efficiency will be 100%
Part b)
for above condition internal resistance of the cell must be ZERO
Explanation:
Electric current supplied by the battery is given as
now the total power supplied by the cell is given as
power supplied to external load is given as
Part a)
If output power is adjusted to have maximum value then value of internal resistance must be ZERO
for same condition power given by the cell
so the efficiency will be 100%
Part b)
for above condition internal resistance of the cell must be ZERO