Doubling the voltage across a parallel-plate capacitor does not double which of the following?
a. the electric field between the plates
c. the energy stored
b. the charge
d. both a and b
Question 2
A 100-N uniform ladder, 8.0 m long, rests against a smooth vertical wall. The coefficient of static friction between ladder and floor is 0.30 . What minimum angle can the ladder make with the floor before it slips?
a. 22
c. 18
b. 51
d. 59