(A) A circuit must form a elowel loop in order for a eteady eurent to be other.
ID: 1998879 • Letter: #
Question
(A) A circuit must form a elowel loop in order for a eteady eurent to be other. (B) High resistance lead to stronger electrical current. X some eurrent, leaving less for the (C) ur current pas through two resistoes conneeted in one resistor u up rewitoes in parallel (D) Equivalent resistance of identieal resistors in aeries greater than the equivalent for the same (E) None of the above. Ts: Magnet ie Induction In deep space (zero gravity) a powerful bar magnet is thrown through a tube made of a conducting but non- magnetizable or copper). The magnet is thrown in with its north pole entering the tube first. Assume that the tube is being held in a fixed position by external forces. 2) Which combination of options is most accurate? A) The magnet's motion through the tube induces electrie eurrent to flow around the tube's surface. of the magmet (B) Induced current's magnetic seld initially has a north pole pointing opposite the to the north pole (c) The magnet slows down in part due to magnetic repulsion effects. passing through the tube x (D) If the magnet is initially slow enough, it's possible that it will eventually stop while (E) None of the above. Magnetic Fields 3) which combination of options is most accurate? (A) Magnetic fields are due to magnetically charged sources of matter. (B) Electric fields that change with time can create magnetic fields. (Cl A positive charge must be attracted to the south pole of a bar magnet. (D) Realistic magnetic field lines always loop back on themselves. (E) None of the above. -(r-axis) the diagram above, particles 1 and 2 are identical positively charged particles. Particle 1 moves rightward along particle 2 moves up. The positive r-axis is directed toward the right. The positive z-axis e positive comes while (not drawn) points up the page. t drawn) out of the page. The positive v-axis Which combination of options are most accurate? (A) The magnetic field that particle 1 creates at particle 2's location is non-zero. (B) The magnetic field that particle 2 creates at particle 1's location points out of the page. (C) Particle 1's magnetic field exerts a downward force on particle 2. (D) Particle 2 does not exert a force of equal magnitude and opposite direction on particle 1. E) None of the above.Explanation / Answer
1
a) current will only flow in a closed circuit
b) V = IR
high resistance will lead to smaller current
c)current is same for resistors in series
d)for 2 resistor in series Req = 2R
for same in paralle Req = R/2
2)
a) True
b) south pole will be induced at the upper end to resist the motion of the magnet
c)True
d)True - as thee is no gravity so it may stop if thespeed is slow enough
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