MasteringPhysics: CH 23 Hwy Google Chrome https:// session. masteringphysics.com
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Question
MasteringPhysics: CH 23 Hwy Google Chrome https:// session. masteringphysics.com 58829854 MPKARA-S16 CH 23 HW Problem 23.30 Problem 23.30 Part C A photoresistor, whose resistance decreases with light What does the voltmeter read at night? intensity, is connected in the circuit of the figure. On a Express your answer with the appropriate units. sunny day, the photoresistor has a resistance of 0.70 k2 On a cloudy day, the resistance rises to 3.6 k2 At night, the resistance is 24 k2. (Figure Value Units Y of 1 Figure 1 Submit My Answers Give Up Part D Photoresistor Does the voltmeter reading increase or decrease as the light intensity increases? 9.0 V O The voltmeter reading increases because the current through the resistor increases. O The voltmeter reading decreases because the current through the resistor decreases 1.0 kn O The voltmeter reading decreases because the current through the resistor increases O The voltmeter reading increases because the current through the resistor decreases. Submit My Answers Give Up 4 HE Search the web and Windows signed in as james chao I Help I Close Resources previous l 12 of 23 l next Continue Provide Feedback 8:41 PM 4 2/28/2016Explanation / Answer
a) 9*1/(1.7) = 5.3 V
b) 9* 1/4.6 = 2.0 V
c) 9*1/25 = 0.36 V
d) increases
The voltmeter reading increases because the current through the resistor increases