Explain whether a solenoid will attract paper clips if there is no current through its coils. Predict what will happen to the force between the solenoid and the paper clips if you increase the current in the coils or increased the number of turns of coil per un

magnetic field strength increases.

Explanation:

No, the solenoid will not attract any magnetic substance if it does not carries a direct electric current.

The formula for the magnetic field strength of the solenoid is given as:

where:

permeability of free space

no. of coil turns in the solenoid

current in the coil

So, when the current & no. of coil turns in the coil are increased then the magnetic field strength also increases.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.