110 likes | 216 Views
Magnetis m. quiz. Draw the magnetic field lines (3 pts each). N. 1. S. 4. 5. N. I. S. 6. I. e. 2. 3. +. 7. 8. e. I. Draw the direction of the magnetic force due to the external magnetic field (2 pts each). e. On the electron On the proton On the alpha particle On the wire.
E N D
Magnetism quiz
Draw the magnetic field lines (3 pts each) N 1. S 4. 5. N I S 6. I e 2. 3. + 7. 8. e I
Draw the direction of the magnetic force due to the external magnetic field (2 pts each) e • On the electron • On the proton • On the alpha particle • On the wire + I α
Draw the direction of the magnetic force due to the current carrying wire (2 pts each) e α • On the electron • On the proton • On the alpha particle + I
Draw the direction of the magnetic force due to the current carrying loop (2 pts each) • On the electron • On the proton • On the alpha particle e α + I
Compare the quantities in columns I & II Write • A if the quantity in I is greater than the quantity in II • B if the quantity in II is greater than the quantity in I • C if the quantities in I &II are equal • D if the quantities in I &II cannot be compared
A B
p α 30 deg
Observe and … • Explain why the coil spins. (5 points) • Determine the magnetic field direction of the tiny magnet. (3 points) • How would you increase the spin of the motor? ( 5 points)
Show your solution. A long straight wire carries a current of 100A. (a) What is the force on an electron moving parallel to the wire, in the opposite direction to the current, at a speed of 1.0 x 107 m/s when it is 10cm from the wire? (b) What is the force on the electron under the same circumstances when it is moving perpendicularly toward the wire?