An electric current can produce:

Correct Answer: D. All of these

An electric current can indeed produce various effects. Let’s break down the options:

A. Chemical Effect: Electric current can cause chemical changes in certain materials, such as electrolysis, where a chemical reaction occurs due to the flow of electric current.

B. Magnetic Effect: When electric current flows through a conductor, it generates a magnetic field around it, known as the magnetic effect of electric current.

C. Heating Effect: When electric current passes through a conductor with resistance, such as a filament in a light bulb or a heating element in an electric stove, it generates heat due to the resistance of the material.

Therefore, the correct answer is:

D. All of these: All of the listed options are effects produced by electric currents.