ae high potential end of a resistor is the end at which the current enters it a
ID: 2038450 • Letter: A
Question
ae high potential end of a resistor is the end at which the current enters it a True b False The direction of the current / in a metal wire is the same as the direction of the internal electric field in the wire but it is opposite to the direction the electrons are moving 17 a True b. False S Light bulb A is rated at 75 W and light bulb B is rated at 100 W Both are designed to operate at 110 V. Which statement is ?orrected? The 75 W bulb has a smaller resistance and greater current than the 100 W bulb The 75 W bulb has a smaller resistance and smaller current than the 100 W bulb The 75 W bulb has a greater resistance and smaller current than the 100 W bulb The 75 W bulb has a greater resistance and greater current than the 100 W bulb a. b. c. d. e We need to know the resistivity of the filaments to answer this question 19./A 9 Volt battery is hooked up to two resistors in series. One has a resistance of S Ohms, and the other has a resistance of 10 Ohms. Several locations along the circuit are marked with letters, as shown below. If the voltage is zero at the negative terminal of the batter the voltage at location B is. 512 + A 10 a. Greater than 4.5 Volts b. Less than 4.5 Volts c. Zero d. 4.5 Volts 0. A circuit requires a 500? resistor, but all that is available are l kS2tessors. If the 1 k? resistors are in abundant supply, how can they be combined to achieve the desired resistance? a. Series b. ParallelExplanation / Answer
17) true
18) C)
because, P = V^2/R or P = I^2*R
19) a) greater than 4.5 V
current through the ckt, I = V/req
= 9/(5 + 10)
= 0.6 A
potential drop across 5 ohms = 5*0.6
= 3 V
so, potential at point B = 9 - 3
= 6.0 V > 4.5 V
10) b) parallel
if we connect two 1k resistors in parallel,
Req = R/2
= 1k/2
= 0.5 k
= 500 ohms
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