Question

Ram learned in high school that electric current is the flow of electrons. Ram’s teacher had also told him that at any temperature the electrons of any metal move very randomly with very high speeds (around 100km/second). So Ram imagines that when a current flows through a conductor, this random motion must cease and all electrons move in one particular direction like a marching army (flow in a sense)

• A. Ram’s idea about motion of electrons is absolutely correct
• B. Ram’s teacher had not told him the right idea about the motion of electrons at any temperature
• C. What Ram learned In high school about current was wrong
• D. Ram is drawing wrong conclusions because when current flows the random motion of electrons needn’t cease

Answer 1

The correct option is D Ram is drawing wrong conclusions because when current flows the random motion of electrons needn’t cease

What Ram’s teacher told him and what he learned in high school are both correct. The problem is in his understanding of it. When current flows the random motion of electrons doesn’t cease but electrons starts drifting along with it. Random motion is because of the temperature and there is no reason for it to cease.