Question 1

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:

Accepted Answer

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 
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

Question 2

A certain ammeter has an internal resistance of 1   $\Omega$ and a range from 0 to 50 mA. To make its range from 0 to 5 A, use:

Accepted Answer

A)  a series resistance of 99  $\Omega$ 
B)  an extremely large (say 106  $\Omega$) series resistance 
C)  a resistance of 99  $\Omega$ in parallel 
D)  a resistance of 1/99  $\Omega$ in parallel 
E)  a resistance of 1/1000  $\Omega$ in parallel 
A)  a series resistance of 99  $\Omega$ 
B)  an extremely large (say 106  $\Omega$) series resistance 
C)  a resistance of 99  $\Omega$ in parallel 
D)  a resistance of 1/99  $\Omega$ in parallel 
E)  a resistance of 1/1000  $\Omega$ in parallel

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)  8 
A)  0.67 
B)  1.5 
C)  3 
D)  4 
E)  8

Question 4

Two identical batteries, each with an emf of 18 V and an internal resistance of 1  $\Omega$, are wired in parallel by connecting their positive terminals together and connecting their negative terminals together. The combination is then wired across a 4- $\Omega$ resistor. The current in each battery is:

Accepted Answer

A)  1.0 A 
B)  2.0 A 
C)  4.0 A 
D)  3.6 A 
E)  7.2 A 
A)  1.0 A 
B)  2.0 A 
C)  4.0 A 
D)  3.6 A 
E)  7.2 A

Question 5

Four 20- $\Omega$  resistors are connected in parallel and the combination is connected to a 20-V emf device. The current in the device is:

Accepted Answer

A)  0.25 A 
B)  1.0 A 
C)  4.0 A 
D)  5.0 A 
E)  100 A 
A)  0.25 A 
B)  1.0 A 
C)  4.0 A 
D)  5.0 A 
E)  100 A

Question 6

A 3- $\Omega$  and a 1.5- $\Omega$  resistor are wired in parallel and the combination is wired in series to a 4- $\Omega$  resistor and a 10-V emf device. The current in the 3- $\Omega$ resistor is:

Accepted Answer

A)  0.33 A 
B)  0.67 A 
C)  2.0 A 
D)  3.3 A 
E)  6.7 A 
A)  0.33 A 
B)  0.67 A 
C)  2.0 A 
D)  3.3 A 
E)  6.7 A

Question 7

A battery of emf 24 V is connected to a 6- $\Omega$ resistor. As a result, current of 3 A exists in the resistor. The terminal potential difference of the battery is:

Accepted Answer

A)  0 
B)  6 V 
C)  12 V 
D)  18 V 
E)  24 V 
A)  0 
B)  6 V 
C)  12 V 
D)  18 V 
E)  24 V

Question 8

Four 20- $\Omega$  resistors are connected in series and the combination is connected to a 20-V emf device. The current in any one of the resistors is:

Accepted Answer

A)  0.25 A 
B)  1.0 A 
C)  4.0 A 
D)  5.0 A 
E)  100 A 
A)  0.25 A 
B)  1.0 A 
C)  4.0 A 
D)  5.0 A 
E)  100 A

Question 9

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?

Accepted Answer

A)  The time constant is independent of V0 
B)  The final charge on C is independent of R 
C)  The total energy dissipated by R is independent of R 
D)  The total energy dissipated by R is independent of V0 
E)  The initial current (just after the battery was connected) is independent of C 
A)  The time constant is independent of V0 
B)  The final charge on C is independent of R 
C)  The total energy dissipated by R is independent of R 
D)  The total energy dissipated by R is independent of V0 
E)  The initial current (just after the battery was connected) is independent of C

Question 10

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

Exam 27: Circuits

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 certain ammeter has an internal resistance of 1 Ω\OmegaΩ and a range from 0 to 50 mA. To make its range from 0 to 5 A, use:

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:

Four 20- Ω\OmegaΩ resistors are connected in parallel and the combination is connected to a 20-V emf device. The current in the device is:

A 3- Ω\OmegaΩ and a 1.5- Ω\OmegaΩ resistor are wired in parallel and the combination is wired in series to a 4- Ω\OmegaΩ resistor and a 10-V emf device. The current in the 3- Ω\OmegaΩ resistor is:

A battery of emf 24 V is connected to a 6- Ω\OmegaΩ resistor. As a result, current of 3 A exists in the resistor. The terminal potential difference of the battery is:

Four 20- Ω\OmegaΩ resistors are connected in series and the combination is connected to a 20-V emf device. The current in any one of the resistors is:

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?

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

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Images

Interference

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

All About Atoms

Conduction of Electricity in Solids

Nuclear Physics

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

A certain ammeter has an internal resistance of 1 $\Omega$ and a range from 0 to 50 mA. To make its range from 0 to 5 A, use:

Four 20- $\Omega$ resistors are connected in parallel and the combination is connected to a 20-V emf device. The current in the device is:

A 3- $\Omega$ and a 1.5- $\Omega$ resistor are wired in parallel and the combination is wired in series to a 4- $\Omega$ resistor and a 10-V emf device. The current in the 3- $\Omega$ resistor is:

A battery of emf 24 V is connected to a 6- $\Omega$ resistor. As a result, current of 3 A exists in the resistor. The terminal potential difference of the battery is:

Four 20- $\Omega$ resistors are connected in series and the combination is connected to a 20-V emf device. The current in any one of the resistors is:

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?

The current in the 5.0- $\Omega$ resistor in the circuit shown is: $The current in the 5.0- \Omega resistor in the circuit shown is:$