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1.	The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in series and a potential difference is maintained across the combination. Then: A. the current in 1 is twice that in 2 B. the current in 1 is half that in 2 C. the potential difference across 1 is twice that across 2 D. the potential difference across 1 is half that across 2 E. none of the above are true
Answer» C. the potential difference across 1 is twice that across 2

2.	Resistor 1 has twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. The rate of thermal energy generation in 1 is: A. the same as that in 2 B. twice that in 2 C. half that in 2 D. four times that in 2 E. one-fourth that in 2
Answer» C. half that in 2

3.	Resistor 1 has twice the resistance of resistor 2. The two are connected in series and a potential difference is maintained across the combination. The rate of thermal energy generation in 1 is: A. the same as that in 2 B. twice that in 2 C. half that in 2 D. four times that in 2 E. one-fourth that in 2
Answer» B. twice that in 2

4.	An initially uncharged capacitor C is connected in series with resistor R. This combination is then connected to a battery of emf V0. Sufficient time elapses so that a steady state is reached. Which of the following statements is NOT true? A. The time constant is independent of V0 B. The final charge on C is independent of R C. The total thermal energy generated by R is independent of R D. The total thermal energy generated by R is independent of V0 E. The initial current (just after the battery was connected) is independent of C
Answer» C. The total thermal energy generated by R is independent of R

5.	The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. Then: A. the current in 1 is twice that in 2 B. the current in 1 is half that in 2 C. the potential difference across 1 is twice that across 2 D. the potential difference across 1 is half that across 2 E. none of the above are true
Answer» B. the current in 1 is half that in 2

6.	Two wires made of the same material have the same lengths but different diameters. They are connected in series to a battery. The quantity that is the same for the wires is: A. the end-to-end potential difference B. the current C. the current density D. the electric field E. the electron drift velocity
Answer» C. the current density

7.	The terminal potential difference of a battery is less than its emf: A. under all conditions B. only when the battery is being charged C. only when the battery is being discharged D. only when there is no current in the battery E. under no conditions
Answer» C. only when the battery is being discharged

8.	Two 110-V light bulbs, one “25W” and the other “100W”, are connected in series to a 110 V source. Then: A. the current in the 100-W bulb is greater than that in the 25-W bulb B. the current in the 100-W bulb is less than that in the 25-W bulb C. both bulbs will light with equal brightness D. each bulb will have a potential difference of 55 V E. none of the above
Answer» E. none of the above

9.	A battery is connected across a parallel combination of two identical resistors. If the potential difference across the terminals is V and the current in the battery is i, then: A. the potential difference across each resistor is V and the current in each resistor is i B. the potential difference across each resistor is V /2 and the current in each resistor is i/2 C. the potential difference across each resistor is V and the current in each resistor is i/2 D. the potential difference across each resistor is V /2 and the current in each resistor is i E. none of the above are true
Answer» C. the potential difference across each resistor is V and the current in each resistor is i/2

10.	A battery is connected across a series combination of two identical resistors. If the potential difference across the terminals is V and the current in the battery is i, then: A. the potential difference across each resistor is V and the current in each resistor is i B. the potential difference across each resistor is V /2 and the current in each resistor is i/2 C. the potential difference across each resistor is V and the current in each resistor is i/2 D. the potential difference across each resistor is V /2 and the current in each resistor is i E. none of the above are true
Answer» D. the potential difference across each resistor is V /2 and the current in each resistor is i

11.	A battery has an emf of 9 V and an internal resistance of 2 Ω. If the potential difference across its terminals is greater than 9 V: A. it must be connected across a large external resistance B. it must be connected across a small external resistance C. the current must be out of the positive terminal D. the current must be out of the negative terminal E. the current must be zero
Answer» D. the current must be out of the negative terminal

12.	A certain voltmeter has an internal resistance of 10, 000 Ω and a range from 0 to 100 V. To give it a range from 0 to 1000 V, one should connect: A. 100, 000 Ω in series B. 100, 000 Ω in parallel C. 1000 Ω in series D. 1000 Ω in parallelE. 90, 000 Ω in series
Answer» E. 90, 000 Ω in series

13.	A certain ammeter has an internal resistance of 1 Ω and a range from 0 to 50 mA. To make its range from 0 to 5 A, use: A. a series resistance of 99 Ω B. an extremely large (say 106 Ω ) series resistance C. a resistance of 99 Ω in parallel D. a resistance of 1/99 Ω in parallelE. a resistance of 1/1000 Ω in parallel
Answer» D. a resistance of 1/99 Ω in parallel

14.	“The sum of the emf’s and potential differences around a closed loop equals zero” is a consequence of: A. Newton’s third law B. Ohm’s law C. Newton’s second law D. conservation of energy E. conservation of charge
Answer» D. conservation of energy

15.	“The sum of the currents into a junction equals the sum of the currents out of the junction” is a consequence of: A. Newton’s third law B. Ohm’s law C. Newton’s second law D. conservation of energy E. conservation of charge
Answer» E. conservation of charge

16.	For any circuit the number of independent equations containing emf’s, resistances, and currents equals: A. the number of junctions B. the number of junctions minus 1 C. the number of branches D. the number of branches minus 1 E. the number of closed loops
Answer» C. the number of branches