Question

SALEM STATE Department of Chemistry ) An ordinary fashlight uses tuo identical AA-batteries connected in series. If each battery has a voltage of err tneglecting nternal resistance), and the bulb draws 0.504 when turned on, the resistance of the balb is: A) zero 13) 1.0 ? c) 2.0 ? D) 3.0 2 E) 4.02 (2) In problems 1, the power dissipated when the bulb turned on is: A) zero B) 10 W C)20 w D)3.0 W E) 40 W (3) In problems 1 and 2, if the bulb is turned on for S.0 minutes A) the bulb passes 2.5 C charge and dissipates 5.0 J enrgy B) the bulb passes 2.5 C charge and dissipates 300 J enrgy. C) the bulb passes 150 C charge and dissipates 5.0 J enrgy D) the bulb passes 150 C charge and dissipates 300 J enrgy E) the bulb passes nero charge and dissipanes zero enrgy (resistivity Lesalo-Sami carries a current of ?5 A. The cross-sectional (4) A 1.0-mm diameter copper wire area of the wire is: A)735 x 107 m B)2.5 x 10m C)3.14 x 10m D)7,85 x 10 E) 3.14 x 10 m (5) In problems 4, the resistance of 100m-long wire is: A) zero B)1.07 ? C) 2.14 2 D) 428 2 E) 6.42 02 (6) An AC voltage is given by the following equation: V- 170 sin(314 rad/sec) t, where V'is measured in volts and r in seconds A) the rms voltage is 170 volt and the frequency is 314 Hz B) the rams voltage is 170 volt and the frequency is 50 Hz C) the rms voltage is 120 volt and the frequency is 314 Hz D) the rms voltage is 120 voli and the frequency is 50 Hz. E) the rms voltage is zero and the frequency is zero. (7) In problems 6, if a 100 ? resistor is connected to the given AC voltage: A) both the peak current and the rms current are zero B) the peak current is 1.7 A and the rms current is 1.2 A C) the peak current is 1.2 A and the ms current is 1.7 A. D) the peak current is 85 A and the rms current is 60 A E) the peak current is 60 A and the rms current is 85 A J NAEINI, PHY1322, Test 2, Summer2018