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The student shines light on the LDR through a circular hole in a piece of black card,as shown in the diagram.The student repeats the experiment using cards with holes of different diameter.The distance from the card to the LDR is always 5 cm.The student varies the current in the circuit by adjusting the variable resistor.(i) The independent variable in this experiment isA the brightness of the light sourceB the diameter of the holeC the distance from the card to the LDRD the resistance of the LDR(ii) A controlled variable in this experiment isA the current in the circuitB the diameter of the holeC the distance from the card to the LDRD the resistance of the LDRGive me the correct answer No SPAM or else ill report you |
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