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Points A and B are 0.10 apart. A point charge of +3.0 × 10-9C is placed at A and a point charge of
−1.0 × 10-9C is placed at B.
i) X is a point on the straight line through A and B, between A and B, where the electric potential is zero.
Calculate the distance AX.
ii) Show on a diagram the appropriate position of a point, Y, on the straight line through A and B where the field strength is zero.
A charged oil drop remains stationary when situated between two parallel horizontal metal plates 25 mm apart and a p.d. of 1000 V is applied to the plates. Find the charge on the drop if it has a mass of 5 × 10-15kg.
Draw a sketch of the electric field between the plates and state if the field is everywhere uniform.
What is the potential gradient between two parallel plane conductors when their separation is 20 mm and a p.d. of 400 V is applied to them?
Calculate the force on an oil drop between the plates if the drop carries a charge of 8 × 10-19C.
What is entropy of system
What is dark fringe width.
Write rotational energy
What is conduction current
A bullet travels straight through a piece of wood of thickness 30mm. The change in the kinetic energy of the bullet is 1.4kJ. Calculate the average force exerted by the wood on the bullet.
.A person exerts a force of 65N at 520 to the horizontal floor to push a box 5.0m across a floor at constant speed. Calculate the work done on the box. Explain, in terms of energy, what happens to the work done on the box.
A table -tennis ball is held under water and then released. Described and explain the subsequent motion of the ball
