Physics II Exam2 Electricity&Magnetism; Name Date I. An all metal cart is on a p
ID: 306802 • Letter: P
Question
Physics II Exam2 Electricity&Magnetism; Name Date I. An all metal cart is on a pair of rails 1.1 m apart. The rails are connected to a 48 volt battery and have resistance of 4 ohms. What is the velocity of the cart when the current in the rails is 4.266667 A nd the field of 3.3 Tesla is pointing vertically? A) 7.934 ms B) 4.9SN C) 1485N D) 11.7N E) 12.144 N uw 2.^0.8 n long metal wire has a radius or 0.8 on and a resistance or 4.5 x 10-Q-wiot resistivity of the netal? A) 1.92 x 10-8q-m B) 1.42 x 10-8 0- C) 108x10-8- D) 3.6x 10-80 E) 1.13x 10-80- C..? , 3. Two point charges are placed along a horizontal axis with the following value andpowitem 73 x-40 cm At what point along the x axis is the electric field zero? A) 22.02 cm B) 32.67 em 9.38 cm D) 36 cm E) 16.125 em 4. A proton moving with a speed of 16 x 10/s perpendi eular to a uniform nagetie tinia o is. 1.5 7 will follow whien of the patha described below to-1.6 x ".. ? and s-rt, kgl A) a straight line path D) a ciroular path ot 5.016 B) a cireular path of 1.113333n radiusE) eircular path ot 2.53 n r C) a esroular path of 5.52 cn radius 5. Two capacicors with capacitances of 2.5 and 3 sicrofacads, respectively are conmectes paraliel. The paral1e1 conbination is then connected in series to a 5capacitor The sy is connected to a 60 v battery. What charge accunuiates on the 2.5 u capacitor A) 150 uc B) 450C C) 127uc D) 22.5 c E) 71.43 uc 6. A resistor is connected to a battery. If you replace the resiator with one that has Sx resistance, by what factor does the power dissipated in the cirouit change? A) 125 N B) 0.2N C) 25N D) SN E) 0.04 N A series RC circuit has a time constant of 4.6 s. The battery has a voltage of 16 V and the maximem current just after closing the switch is 23 A. The capacitor is initially uncharged. What is the charge on the capacitor 1.4 s after the switch is closed? 7. s0 V A) 19.32 ud B) 22.08yC C) 6.44.c D) 13.88,c E) 5.26iC 8. A toroid of permittivity of 2000-o("-4 Pi X 10) and 1500 turns of wire and ciromirence of 4 m is tit so gap of 0.6 cm. What is the B-field amount in the gap when the current in the wire wapping the soroid is 12A A) 0ST B) 09T C 0.3648 Tesla D) 0.109091 T E 0036Explanation / Answer
1) (a) 7.934 m/s
We don't even need to solve this as it is a trick question. All the other options have N(newton) which is the unit of Force and not velocity.