4, Find the resultant of three concurrent forces of 8 N, 12 N and 16 N acting at respective angles 30°, 60° and 90° relative to the +x-direction.
A. 43.0 N, 067°
B.-36.0 N, 180°
C. 30.4 N, 090°
D. 43.0 N, 247°​

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j