IP A spark plug in a car has electrodes separated by a gap of 6.5×10−2 in . To create a spark and ignite the air-fuel mixture in the engine, an electric field of 3.2×106 V/m is required in the gap.

a.) What potential difference must be applied to the spark plug to initiatea spark?b.) Would the necessary applied voltage be greater or less if theseparation were greater? Would that be a good idea for animprovement in design? Find the potential difference for a separationof 0.05 inches.

a.)

b.)

Explanation:

Electric Field and Potential Difference

There are several conditions that must be met for a spark to be created into an air gap. Once the physical conditions are fixed, a minimum electric field is necessary for the spark to be initiated. Let s be the separation between the electrodes and V their potential difference. The electric field is

a.)

Solving for V

The separation is

Thus the potential difference is

b.) If the separation was greater, the applied voltage needs to be greater if the electric field has to be constant. One possible measure to keep electrodes as close as possible is to build them as sharp edges. It gives the spark an easier path to travel to.

If the separation is 0.05 inches =0.00127 m

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