Smooth curve Good distribution Range: 28↔ 32 (0C–1) or (K–1) Ω Ω Oil is a better conductor of heat / water contains air / (impure) water conducts electricity/good thermal contact TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH POTENTIAL DIFFERENCE (V) FOR A THIN METALLIC CONDUCTOR [2013] A student was asked to investigate the variation of current with potential difference for a thin metallic conductor. The student set up a circuit using appropriate equipment. The student recorded the values of the current passing through the conductor for the corresponding values of I potential difference V. The recorded data are shown in the table. 1.0 2.0 3.0 4.0 5.0 6.0 V/V 0.17 0.34 0.50 0.64 0.77 0.88 I/A Draw and label the circuit diagram used by the student. Name the device in the circuit that is used to vary the potential difference across the conductor. how the student used this device to vary the potential difference. Use the data in the table to draw a graph on graph paper to show the variation of current with potential difference. Use your graph to find the value of the resistance of the conductor when the current is 0.7 A. Explain the shape of your graph. 1. apparatus: p.s.u. / battery, ammeter, voltmeter ammeter in series with conductor voltmeter in parallel with conductor Variable p.s.u. / variable resistor (rheostat) / potential divider the dial, moved the sliding contact See 4.5 V (when = 0.7 A on graph) V I ≈ 6.4 R ≈ Ω Resistance (of conductor) increases with increasing temperature Or appropriate reference to Ohm‟s law and to resistance TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH POTENTIAL DIFFERENCE (V) FOR A FILAMENT BULB [2011 OL] The diagram a circuit used to investigate the variation of current with potential difference for a filament lamp. Name the instrument X. What does it measure? Name the component Y. What does it do? The table shows the values recorded for the current and the potential difference during the investigation.
Smooth curve Good distribution Range: 28↔ 32 Ω (0C–1) or Ω (K–1) Oil is a better conductor of heat / water contains air / (impure) water conducts electricity/good thermal contact TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH POTENTIAL DIFFERENCE (V) FOR A THIN METALLIC CONDUCTOR [2013] A student was asked to investigate the variation of current with potential difference for a thin metallic conductor. The student set up a circuit using appropriate equipment. The student recorded the values of the current I passing through the conductor for the corresponding values of potential difference V. The recorded data are shown in the table. V/V 1.0 2.0 3.0 4.0 5.0 6.0 I/A 0.17 0.34 0.50 0.64 0.77 0.88 Draw and label the circuit diagram used by the student. Name the device in the circuit that is used to vary the potential difference across the conductor. how the student used this device to vary the potential difference. Use the data in the table to draw a graph on graph paper to show the variation of current with potential difference. Use your graph to find the value of the resistance of the conductor when the current is 0.7 A. Explain the shape of your graph. 1. apparatus: p.s.u. / battery, ammeter, voltmeter ammeter in series with conductor voltmeter in parallel with conductor Variable p.s.u. / variable resistor (rheostat) / potential divider the dial, moved the sliding contact See V ≈ 4.5 V (when I = 0.7 A on graph) R ≈ 6.4 Ω Resistance (of conductor) increases with increasing temperature Or appropriate reference to Ohm‟s law and to resistance TO INVESTIGATE THE VARIATION OF CURRENT (I) WITH POTENTIAL DIFFERENCE (V) FOR A FILAMENT BULB [2011 OL] The diagram a circuit used to investigate the variation of current with potential difference for a filament lamp. Name the instrument X. What does it measure? Name the component Y. What does it do? The table shows the values recorded for the current and the potential difference during the investigation.
1.%20Section%20A%20Questions%20and%20Solutions.docx