Questions from College Physics

Q: How many different resistance values can be constructed from a 2.

How many different resistance values can be constructed from a 2.0 - Ω, a 4.0 - Ω, and a 6.0 - Ω resistor? Show how you would get each resistance value either individually or by combining them.

Q: (a) Calculate the potential difference between points a and b

(a) Calculate the potential difference between points a and b in Figure P18.47 and (b) Identify which point is at the higher potential. Figure P18.47:

Q: For the circuit shown in Figure P18.48, the voltmeter

For the circuit shown in Figure P18.48, the voltmeter reads 6.0 V and the ammeter reads 3.0 mA. Find (a) The value of R, (b) The emf of the battery, and (c) The voltage across the 3.0 â€
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Q: The resistor R in Figure P18.58 dissipates 20 W of

The resistor R in Figure P18.58 dissipates 20 W of power. Determine the value of R. Figure P18.58:

Q: Figure P18.49 shows separate series and parallel circuits.

Figure P18.49 shows separate series and parallel circuits. (a) What is the ratio ΔVseries /ΔVparallel? (b) What is the ratio of the power dissipated by the resistors in the ser...

Q: Three 60.0 - W, 120 - V light-

Three 60.0 - W, 120 - V light-bulbs are connected across a 120 - V power source, as shown in Figure P18.50. Find (a) The total power delivered to the three bulbs and (b) The potential difference acros...

Q: When two unknown resistors are connected in series with a battery,

When two unknown resistors are connected in series with a battery, the battery delivers 225 W and carries a total current of 5.00 A. For the same total current, 50.0 W is delivered when the resistors...

Q: The circuit in Figure P18.52a consists of three resistors and

The circuit in Figure P18.52a consists of three resistors and one battery with no internal resistance. (a) Find the current in the 5.00 - Ω resistor. (b) Find the power delivered to the 5....

Q: A circuit consists of three identical lamps, each of resistance R

A circuit consists of three identical lamps, each of resistance R, connected to a battery as in Figure P18.53. (a) Calculate an expression for the equivalent resistance of the circuit when the switch...

Q: A voltage DV is applied to a series configuration of n resistors

A voltage DV is applied to a series configuration of n resistors, each of resistance R. The circuit components are reconnected in a parallel configuration, and voltage ΔV is again applied. Show that t...