The circuit element whose purpose is to convert electrical energy into another form of energy is the

resistor

Explanation:

There are so many circuit components, such as an electric bulb it converts the electrical energy into light energy.

In case of heater, the electrical energy is converted into heat energy as so on.

In all the cases, the instruments all have some resistance so we can say that the circuit element which converts one form of energy into another is resistor.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards