Question 1

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Accepted Answer

A)   3d
B)   9d
C)   d/3
D)   d/9
E)   d/81F) C) and D)
G) B) and E)

Question 2

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Accepted Answer

A)   3d
B)   9d
C)   d/3
D)   d/9
E)   d/81F) A) and D)
G) B) and E) C

Question 3

In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance (in ohms)  of each bulb is:

Accepted Answer

A)   0.67
B)   1.5
C)   3
D)   4
E)   8F) A) and E)
G) B) and E)

Question 4

To make a galvanometer into an ammeter, connect:

Accepted Answer

A)   a high resistance in parallel
B)   a high resistance in series
C)   a low resistance in series
D)   a low resistance in parallel
E)   a source of emf in seriesF) A) and B)
G) C) and E)

Question 5

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Accepted Answer

A)   0.43 ms
B)   2.3 ms
C)   6.9 ms
D)   10 ms
E)   14 msF) None of the above
G) B) and E) E

Question 6

The positive terminals of two batteries with emf's of 1 and  2, respectively, are connected together. Here  1 >  2. The circuit is completed by connecting the negative terminals. If each battery has an internal resistance of r, the rate in watts at which electrical energy is converted to chemical energy in the smaller battery is: A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" >1 and 2, respectively, are connected together. Here 1 > 2. The circuit is completed by connecting the negative terminals. If each battery has an internal resistance of r, the rate in watts at which electrical energy is converted to chemical energy in the smaller battery is:

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and C)

Question 7

Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

Accepted Answer

A)   1:4
B)   1:2
C)   1:1
D)   2:1
E)   4:1F) C) and E)
G) B) and C) B

Question 8

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Accepted Answer

A)   B - J + 1
B)   B - J
C)   B
D)   L
E)   L - JF) C) and E)
G) A) and B)

Question 9

The time constant RC has units of:

Accepted Answer

A)   second/farad
B)   second/ohm
C)   1/second
D)   second/watt
E)   none of theseF) A) and C)
G) A) and B)

Question 10

The current in the 5.0- Ω\OmegaΩ resistor in the circuit shown is:

Accepted Answer

A)   0.42 A
B)   0.67 A
C)   1.5 A
D)   2.4 A
E)   3.0 A F) A) and B)
G) C) and D)

Exam 11: Circuits

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Correct Answer
verified

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Correct Answer
verified
C

In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance (in ohms) of each bulb is:

Correct Answer
verified

To make a galvanometer into an ammeter, connect:

Correct Answer
verified

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Correct Answer
verified
E

Correct Answer
verified

Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

Correct Answer
verified
B

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Correct Answer
verified

The time constant RC has units of:

Correct Answer
verified

The current in the 5.0- $\Omega$ resistor in the circuit shown is: $The current in the 5.0- \Omega resistor in the circuit shown is: A) 0.42 A B) 0.67 A C) 1.5 A D) 2.4 A E) 3.0 A$

Correct Answer
verified

Exam 11: Circuits

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Correct AnswerverifiedShow Answer

Nine identical wires, each of diameter d and length L, are connected in series. The combination has the same resistance as a single similar wire of length L but whose diameter is:

Correct AnswerverifiedC

In an antique automobile, a 6-V battery supplies a total of 48 W to two identical headlights in parallel. The resistance (in ohms) of each bulb is:

Correct AnswerverifiedShow Answer

To make a galvanometer into an ammeter, connect:

Correct AnswerverifiedShow Answer

A certain capacitor, in series with a resistor, is being charged. At the end of 10 ms its charge is half the final value. The time constant for the process is about:

Correct AnswerverifiedE

Correct AnswerverifiedShow Answer

Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:

Correct AnswerverifiedB

If a circuit has L closed loops, B branches, and J junctions the number of independent loop equations is:

Correct AnswerverifiedShow Answer

The time constant RC has units of:

Correct AnswerverifiedShow Answer

The current in the 5.0- Ω\OmegaΩ resistor in the circuit shown is:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

The current in the 5.0- $\Omega$ resistor in the circuit shown is: $The current in the 5.0- \Omega resistor in the circuit shown is: A) 0.42 A B) 0.67 A C) 1.5 A D) 2.4 A E) 3.0 A$

Correct Answer
verified