Understanding Current Flow and Magnetic Fields in Physics
Explore the concept of current flow and magnetic fields in physics through a series of questions and images. Learn about the direction of current flow, magnetic forces in conducting wires, and the orientation of magnetic fields induced by current in loops.
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Presentation Transcript
If moving charges are positive, then current flows in the direction of the charges. A. True B. False 0% 0% True False
If moving charges are negative, then current flows in the direction of the charges. A. True B. False 0% 0% True False
What direction must the current be flowing though the bar if it is accelerating to the right. A. Up B. Down 0% 0% Up Down
A conducting wire with positive moving charges has current as depicted. In what direction is the resulting magnetic force? A. to the left B. to the right C. towards the top of the screen D. towards the bottom of the screen E. into the screen F. out of the screen G. none of the above 0% 0% 0% 0% 0% 0% 0% to the left into the screen to the right out of the screen none of the above towards the bottom of th... towards the top of the s...
A conducting wire with negative moving charges has current as depicted. In what direction is the resulting magnetic force? A. to the left B. to the right C. towards the top of the screen D. towards the bottom of the screen E. into the screen F. out of the screen G. none of the above 0% 0% 0% 0% 0% 0% 0% to the left into the screen to the right out of the screen none of the above towards the bottom of th... towards the top of the s...
Magnetic field lines are induced by the current in a circular loop. In what direction will the magnetic field point at the very center of the loop? A. B. C. D. E. Towards the top of the loop Towards the bottom of the loop Towards the right of the loop Towards the left of the loop Out of the screen, normal to the loop. Into the screen, normal to the loop. Some strange off-center direction not listed above. F. G. 0% 0% 0% 0% 0% 0% 0% Towards the top of the loop Towards the left of the loop Out of the screen, norma... Towards the bottom of t.. Towards the right of the... Some strange off-center ... Into the screen, normal t...
If the current carrying loop is replaced with two loops made of the same material, then the strength of the magnetic field in the center of the loops A. stays the same B. is zero since the loops magnetic fields cancel. C. doubles in strength. D. halves in strength. E. (none of the above) 0% 0% 0% 0% 0% stays the same halves in strength. (none of the above) doubles in strength. is zero since the loops ...
If the current carrying loop is replaced by a loop with twice the radius, the strength of the magnetic field at the center of the loop . A. stays the same B. is four times the strength C. doubles in strength. D. halves in strength. E. is the strength. F. (none of the above) 0% 0% 0% 0% 0% 0% stays the same is the strength. halves in strength. (none of the above) doubles in strength. is four times the strength
