[WASSCE June 2008 Qu 11] [
A force of 20 N acts at an angle of 30° to the
horizontal. Determine the vertical component
of the force.
A. 17.30 N
B. 11.50 N
C. 10.00 N
D. 7.50 N
[WASSCE Nov 2008 Qu 11​

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Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

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