A student needs a 4-ohm resistor to complete a circuit. Only a large quantity of 1-ohm resistors are available. In order to complete the circuit, the student should connect A two of the 1-ohm resistors in series and two in parallel. B four 1-ohm resistors in parallel. C four 1-ohm resistors in series. D only two 1-ohm resistors in paralle

C) He should connect four 1-Ohm resistors in series

Explanation:

If there are n resistors connected in series, say , the total resistance of the connection is the sum of the individual resistances, ie for a series combination of n resistors, the following holds;

where is the total resistance.

Since the student needs a 4-Ohm resistor and the only available ones are 1-Ohm each, he should combine each of them in series.

asthenosphere and convection

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods