Exam 3 Calculation problemsName___________________________________1)The current through a 10-ohm resistor connected to a 120-V power supply isA)12 A.B)120 A.C)10 A.D)1 A.E)none of these1)2)A 10-ohm resistor has a 5-A current in it. What is the voltage across the resistor?A)15 VB)5 VC)10 VD)20 VE)more than 20 V2)3)When a 10-V battery is connected to a resistor, the current in the resistor is 2 A. What is theresistor's value?A)5 ohmsB)2 ohmsC)20 ohmsD)10 ohmsE)more than 20 ohms3)4)A 4-ohm resistor is connected in parallel with a 6-ohm resistor. This combination produces anequivalent resistance ofA)5.5 ohms.B)2.4 ohms.C)4 ohms.D)5 ohms.E)10 ohms.4)5)The current through two identical light bulbs connected in series is 0.25 A. The voltage across bothbulbs is 110 V. The resistance of a single light bulb isA)22 ohms.B)440 ohms.C)220 ohms.D)44 ohms.E)none of these5)6)A 6.0 μC negative charge is attracted to a large, well-anchored, positive charge. How much kineticenergy does the negatively charged object gain if the potential difference through which it movesis 3 mV?A)0.50 JB) 18 nJC)6.0 μJD)0.50 kJ6)17)An electron was accelerated from rest through a potential difference of 9900 V. What is its speed?A)4.9 × 107 m/sB)5.9 × 107 m/sC)3.9 × 107 m/sD)2.9 × 107 m/s7)8)A wire has a current of 6.0 mA in it. How many electrons pass a given point in a minute?A)6.3 × 1014B)360C)5.4 × 10-15D) 2.3 × 10188)9)A proton with speed 1.5 × 105 m/s falls through a potential difference of 100 volts, gaining speed.What is the speed reached?A)2.04 × 105 m/sB)4.56 × 105 m/sC)8.80 × 105 m/sD)3.55 × 105 m/sE)1.55 × 106 m/s9)10)A 100.0 pF capacitor consists of two circular plates of radius 0.40 mm. How far apart are the plates?(The value of εo is 8.85 × 10-12 C2/N∙m2.)A)0.0025 μmB)0.0050 μmC)0.044 μmD)0.022 μm10)11)A 1.0 μF capacitor has a potential difference of 6.0 V applied across its plates. If the potentialdifference across its plates is increased to 8.0 V, how much additional energy does the capacitorstore?A)2.0 μJB)28 μJC)4.0 μJD)14 μJ11)12)A battery does 10.0 J of work moving 4.0 C of charge between its terminals. What is the emf of thebattery?A)40 VB)2.5 VC)0.63 VD)160 V12)213)Each of the resistors in the circuit shown have a resistance of 160.0 Ω. What is the equivalentresistance of the circuit?A)160.0 ΩB)640.0 ΩC)480.0 ΩD)400.0 Ω13)14)The resistors in the circuit shown each have a resistance of 600 Ω. What is the equivalent resistanceof the circuit?A)600 ΩB)1200 ΩC)150 ΩD)2400 Ω14)15)A 10.0 V battery is connected across two resistors in series. If the resistors have resistances of840.0 Ω and 590.0 Ω, what is the voltage drop across the 590.0 Ω resistor?A)7.0 VB) 14 VC)5.9 VD)4.1 V15)16)A very long wire generates a magnetic field of 0.0050 × 10-4 T at a distance of 3.0 mm. What is themagnitude of the current?A)3300 mAB)7.5 mAC)24,000 mAD)1.7 mA16)17)A wire carrying a current is shaped in the form of a circular loop of radius 4.0 mm. If the magneticfield strength at its center is 1.1 mT with no external magnetic fields contributing to it, what is themagnitude of the current that flows through the wire?A)28 AB) 17 AC) 14 AD)7.0 A17)3Answer KeyTestname:
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