The diagram above shows the capacitors C1, C2 and C3 2μF, 6μF and 3μF respectively. The potential difference across C1, C2 and C3 respectively are

Assessment: JAMB UTME - Physics - 2001 Subject: Physics

Question 1 Report

4V, 6V and 2V

2V, 6V and 4V

6V, 4V and 2V

6V, 2V and 4V

Answer Details

C = Q/V => Q = CV : ∴V = Q/C
∴V1 = Q/C1; V2 = Q/C;
V3 = Q/C3
for series
1/C = 1/C1 + 1/C2 + 1/C3
= 1/2 + 1/6 + 1/3

=	3+1+2
	_6

= 6/6 = 1
∴ C = 1μF = 1.0 x 10-6F
∴ Q = CV = 1.0 x 10-6 x 12
= 12.0 x 10-6C
∴V1 = Q/C1

=	12.0x10-6
	2 x 10-6

= 6V
V2 = Q/C2

=	12.0x10-6
	6 x 10-6

= 2V
V3 = Q/C3

=	12.0x10-6
	3 x 10-6

∴ 6V, 2V and 4V

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