ࡱ> 5@ m bjbj22 XX 6)>>>>Bfff8$Bz!6  $0"R$j!N!>>6Q4!   ^>:6    0 6 )Jf3u  J!0z! $$, $*>>>>$ < !!BB$ f:BBf   FILENAME 3b Potential Dividers and Sensors prep SENSORS MARK: 4. In the circuits above the light bulbs are just lit. In the circuit with the Thermistor, does the lamp get brighter or dimmer if the temperature rises? Does the second lamp get brighter or dimmer if the LDR is shaded? Thermistor lamp ..................................... LDR lamp 5. In the circuits above say whether Vout rises or falls if the temperature falls if the LDR is in the dark If the thermistor in the circuit to the right has a resistance of 400R at 20C and 100R at 70C calculate Vout at 20C and at 70C. 20C 70C The following table is based on the potential divider circuit. Fill in the missing values: EMBED MSWorks.Table.4 Now fill in the values you measured for the LDR and the thermistor in the following table. Then calculate and fill in the output voltage across the bottom resistor: EMBED MSWorks.Table.4 3 Now fill in the missing values when one of the resistors is replaced with a switch. You will need to guess what the resistance of the switch would be. It shouldnt be too difficult if you think about it. EMBED MSWorks.Table.4 Turn over for more questions! 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