(a) Current I enters a resistor R as shown in Figure Q4(a). A R B Figure Q4(a) : Current I through resistor R (i) Is the potential higher at point A or at point B? (ii) Is the current greater at point A or at point B?
(a) Current I enters a resistor R as shown in Figure Q4(a). A R B Figure Q4(a) : Current I through resistor R (i) Is the potential higher at point A or at point B? (ii) Is the current greater at point A or at point B?
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Answer all the electric and magnetism questions given.
Transcribed Image Text:(а)
Current I enters a resistor R as shown in Figure Q4(a).
→I
A
R
В
Figure Q4(a) : Current I through resistor R
(i)
Is the potential higher at point A or at point B?
(ii)
Is the current greater at point A or at point B?
(b)
Two lamps with batteries are connected in two different connection as shown in
Figure Q4(b). Give ONE (1) advantage of each connection.
Figure Q4(b) : Two different connections of batteries
Transcribed Image Text:(c)
A sequence of potential difference, V is applied across a wire (diameter = 0.32 mm,
length = 11 cm) and the resulting currents, I are measured as in Table Q4(c) below.
Table Q4(c): Experiment Data
V (V)
0.100
0.200
0.300
0.400
0.500
I (mA) 72
144
216
288
360
(i)
Plot the graph of I versus V.
(ii)
Does the plotting result in a straight-line curve? Explain why this is so and
determine the theoretical prediction based on the Ohm's law.
(iii)
Determine the wire's resistance value, R.
(iv) Calculate the wire's resistivity value, p and use the table in APPENDIX to
identify the solid material from which it is composed.
(d)
Four capacitors are connected as shown in Figure Q4(d). Assume AVab = 15.0 V.
Calculate the charge on each capacitor.
C, = 6.0 µF
C2 = 3.0 µF
b
C4 = 8.0 µF
C3 = 6.0 µF
Figure Q4(d) : Capacitance in series and parallel
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