CTR-1What is the correct way to connect the battery to the light bulb to make it light up?CTR-2The instructor goes crazy and grabs the terminals of a fully-charged 12V battery. He will ..A) immediately be killed.B) not be killed, but he will start hollering because it really hurts.C) not feel anything. This action is harmless.+-A) +-B) +-C) +-D) metal insulatorhollow metal E) None of these will workCTR-3 Which graph of voltage vs. current shows the behavior of an "ohmic" resistor (a resistor obeying Ohm's Law).IV(A)IV(D)IV(C)IV(B)(E) None of theseCTR-4Two cylindrical resistors are made of the same material (same resistivity ). Resistor 2 is twice as long and has twice the diameter of resistor 1. What is the ratio RR21? (The arrow shows the direction of current flow.)A) 2 B) 4C) 1/2 D) 1/4E) 112CTR-5A battery with emf or voltage V is attached to a resistor of resistance R. The circuit diagram is shown below. The point A is at zero volts.The correct voltages at the points B, C, and D are:A) VB = 0V, VC = 5V, VD = 0V.B) VB = 5V, VC < 5V, VD > 0V.C) VB = 5V, VC < 5V, VD = 0V.D) VB = 5V, VC = 5V, VD = 0V.E) None of these.CTR-6 Two light bulbs are connected to abattery in series (in a chain, one afteranother). How does the current in upper lightbulb A compare to the current in lower lightbulb B?A) IA > IBB) IA < IBC) IA = IBD) answer depends on relative size o CBAV = 5 VR = 10 ΩDVRARBIbatIAIBCTR-7A light bulb is attached to a battery with constant voltage V. The light filament has resistance R. The circuit diagram is shown below. When the light bulb is first turned on by attaching to the battery, the filament heats rapidly, and as it heats, its resistance R increases (due to increased scattering of electrons by thermal vibrations).As the light bulb filament heats up, the current I in the filament ...A) increases B) decreases C) stays the same.V = 5 VR ICTR-8A 60W light bulb and a 100W light bulb each has a filament with a certainresistance (when the bulb is on and hot). How do the resistances of the filaments compare?A) R60W = R100W.B) R60W > R100WC) R60W < R100WD) Impossible to tell without further information.Hint: When a light bulb is plugged in, it is essentially attached to a battery with constant voltage. CTR-9Two light bulbs, A and B, are in series, so they carry the same current. Light bulb A is brighter than B. Which bulb has higher resistance? (HINT:brighter means more power.)A) A B) B C) Same resistance.V A BCTR-10Please answer now.The voltage provided by your household wall sockets is....A) AC voltageB) DC voltageC) Depends on the appliance which you plug into the socket.Answer: B has lower resistance; A has higher resistance. Both bulbs have the same current I. According to P = I2R, if the currents are the same, thebulb with the larger R will have the larger power
View Full Document
Unlocking...