As more resistors are added in series, the equivalent resistance of the circuit approaches infinity. In contrast, as more resistors are added in parallel, the equivalent resistance
1. approaches infinity.
2. approaches zero.
3. becomes zero.
4. approaches 1 ?.
2
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Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?
A) The equivalent resistance is equal to that of any one of the resistors. B) The equivalent resistance is equal to average of the four resistances. C) The equivalent resistance is less than that of the smallest resistor. D) The equivalent resistance is less than that of the largest resistor. E) The equivalent resistance is more than the largest resistance.
The Sun and the Moon are both on an observer's overhead meridian during what phase of the Moon?
A 4.00-kg block rests on a 30.0° incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline?
A) 34.0 N B) 51.1 N C) 54.7 N D) 84.0 N E) 76.4 N
A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. (a) How much work does the person do? (b) What is the diver's kinetic energy upon entering the water after diving off?