Question 1

What is the current flowing through the 2-Ω resistor?

Accepted Answer

A) 2 A 
B) 3 A 
C) 4 A 
D) 6 A 
A) 2 A 
B) 3 A 
C) 4 A 
D) 6 A

Question 2

Three 4.00-Ω resistors are connected in parallel to a 10.4-V battery.What is the current in any one of the resistors?

Accepted Answer

A) 14.4 A 
B) 6.76 A 
C) 2.60 A 
D) 41.6 A 
E) 6.40 A 
A) 14.4 A 
B) 6.76 A 
C) 2.60 A 
D) 41.6 A 
E) 6.40 A

Question 3

Resistors of values R1 = 6.00 Ω,R2 = 4.00 Ω,R3 = 10.0 Ω,and R4 = 7.00 Ω are combined as shown.What is the equivalent resistance for this combination?

Accepted Answer

A) 2.30 Ω 
B) 3.00 Ω 
C) 10.7 Ω 
D) 27.0 Ω 
A) 2.30 Ω 
B) 3.00 Ω 
C) 10.7 Ω 
D) 27.0 Ω

Question 4

Five resistors each have resistance R.Three of the resistors are connected in series and this combination is then connected in parallel with the two other resistors which have been connected in series with each other.What is the equivalent resistance for this arrangement?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 5

A 10-V-emf battery is connected in series with the following: a 2-μF capacitor,a 2-Ω resistor,an ammeter,and a switch,initially open;a voltmeter is connected in parallel across the capacitor.After the switch has been closed for a relatively long period (several seconds,say),what are the current and capacitor voltage readings,respectively?

Accepted Answer

A) zero A,10 V 
B) zero A,zero V 
C) 5 A,zero V 
D) 5 A,10 V 
A) zero A,10 V 
B) zero A,zero V 
C) 5 A,zero V 
D) 5 A,10 V

Question 6

The following three appliances are connected to a 120-V house circuit: i)toaster,1 325 W,ii)coffee pot,650 W,and iii)microwave,600 W.If all were operated at the same time,what total current would they draw?

Accepted Answer

A) 2.10 A 
B) 47.5 A 
C) 7.15 A 
D) 21.5 A 
E) 11.0 A 
A) 2.10 A 
B) 47.5 A 
C) 7.15 A 
D) 21.5 A 
E) 11.0 A

Question 7

What is the equivalent resistance for these 3.00-Ω resistors?

Accepted Answer

A) 1.33 Ω 
B) 2.25 Ω 
C) 3.00 Ω 
D) 7.50 Ω 
A) 1.33 Ω 
B) 2.25 Ω 
C) 3.00 Ω 
D) 7.50 Ω

Question 8

In circuits involving resistors and capacitors the quantity 63% often arises.Which of the following is equivalent to this quantity?

Accepted Answer

A) e​-2 
B) 1 - e​-1 
C) 1 - e​-2 
D) e​-1 
A) e​-2 
B) 1 - e​-1 
C) 1 - e​-2 
D) e​-1

Question 9

In an RC circuit using two capacitors in series with two resistors,which of the following combinations would give the greatest time constant?

Accepted Answer

A) both capacitors in series placed in series with both resistors in series 
B) both capacitors in parallel placed in series with both resistors in parallel 
C) both capacitors in series placed in series with both resistors in parallel 
D) both capacitors in parallel placed in series with both resistors in series 
A) both capacitors in series placed in series with both resistors in series 
B) both capacitors in parallel placed in series with both resistors in parallel 
C) both capacitors in series placed in series with both resistors in parallel 
D) both capacitors in parallel placed in series with both resistors in series

Question 10

Three resistors,each with resistance R1,are in series in a circuit.They are replaced by one equivalent resistor,R.Comparing this resistor to the first resistor of the initial circuit,which of the following is true?

Accepted Answer

A) The current through R equals the current through R1. 
B) The voltage across R equals the voltage across R1. 
C) The power given off by R equals the power given off by R1. 
D) R is less than R1. 
A) The current through R equals the current through R1. 
B) The voltage across R equals the voltage across R1. 
C) The power given off by R equals the power given off by R1. 
D) R is less than R1.

Question 11

The ammeter shown in the figure reads 4.4 A,RS1U1B11S1U1B0 = 7.0 Ω,RS1U1B12S1U1B0 = 5.0 Ω,and RS1U1B13S1U1B0 = 2.0 Ω.  
-What is $\varepsilon$?

Accepted Answer

A) 34 V 
B) -9.8 V 
C) 22 V 
D) -2.2 V 
A) 34 V 
B) -9.8 V 
C) 22 V 
D) -2.2 V

Question 12

What is Kirchhoff's 1st equation for this junction?

Accepted Answer

A) I1 = I2 + I3 
B) I2 = I1+ I2 
C) I3 = I1 + I2 
D) I1 + I2 + I3 = 0 
A) I1 = I2 + I3 
B) I2 = I1+ I2 
C) I3 = I1 + I2 
D) I1 + I2 + I3 = 0

Question 13

If R1 2 3,and if these resistors are connected in series in a circuit,which one dissipates the greatest power?

Accepted Answer

A) R1 
B) R2 
C) R3 
D) All are equal in power dissipation. 
A) R1 
B) R2 
C) R3 
D) All are equal in power dissipation.

Question 14

A 10-V-emf battery is connected in series with the following: a 2-µF capacitor,a 2.0-Ω resistor,an ammeter,and a switch,initially open;a voltmeter is connected in parallel across the capacitor.At the instant the switch is closed,what are the current and capacitor voltage readings,respectively?

Accepted Answer

A) zero A,10 V 
B) zero A,zero V 
C) 5 A,zero V 
D) 5 A,10 V 
A) zero A,10 V 
B) zero A,zero V 
C) 5 A,zero V 
D) 5 A,10 V

Question 15

Three resistors connected in parallel have individual values of 4.0,6.0,and 10.0 Ω,respectively.If this combination is connected in series with a 12-V battery and a 2.0-Ω resistor,what is the current in the 10.0-Ω resistor?

Accepted Answer

A) 0.55 A 
B) 1.0 A 
C) 11 A 
D) 16 A 
A) 0.55 A 
B) 1.0 A 
C) 11 A 
D) 16 A

Question 16

A 1 000-V battery,a 3 000-Ω resistor,and a 0.50-μF capacitor are connected in series with a switch.The time constant for such a circuit,designated by the Greek letter,τ,is defined as the time that the capacitor takes to charge to 63% of its capacity after the switch is closed.What is the current in the circuit at a time interval of τ seconds after the switch has been closed?

Accepted Answer

A) 0.14 A 
B) 0.21 A 
C) 0.12 A 
D) 0.32 A 
A) 0.14 A 
B) 0.21 A 
C) 0.12 A 
D) 0.32 A

Question 17

What is the current through the 8.0-Ω resistor?

Accepted Answer

A) 1.0 A 
B) 0.50 A 
C) 1.5 A 
D) 2.0 A 
A) 1.0 A 
B) 0.50 A 
C) 1.5 A 
D) 2.0 A

Question 18

Resistors of values 10 Ω,14 Ω,and 23 Ω are connected in series across a battery with a small internal resistance.Which resistor dissipates the greatest power?

Accepted Answer

A) the 10-Ω resistor 
B) the 14-Ω resistor 
C) the 23-Ω resistor 
D) The answer depends on the internal resistance of the battery. 
A) the 10-Ω resistor 
B) the 14-Ω resistor 
C) the 23-Ω resistor 
D) The answer depends on the internal resistance of the battery.

Question 19

How much current is flowing in one of the 10-Ω resistors?

Accepted Answer

A) 0.80 A 
B) 2.0 A 
C) 1.6 A 
D) 2.4 A 
A) 0.80 A 
B) 2.0 A 
C) 1.6 A 
D) 2.4 A

Question 20

Three 7.0-Ω resistors are connected in series.What is their equivalent resistance?

Accepted Answer

A) 21 Ω 
B) 7.0 Ω 
C) 16 Ω 
D) 2.3 Ω 
E) 10 Ω 
A) 21 Ω 
B) 7.0 Ω 
C) 16 Ω 
D) 2.3 Ω 
E) 10 Ω

Exam 18: Direct-Current Circuits

What is the current flowing through the 2-Ω resistor?

Three 4.00-Ω resistors are connected in parallel to a 10.4-V battery.What is the current in any one of the resistors?

Resistors of values R1 = 6.00 Ω,R2 = 4.00 Ω,R3 = 10.0 Ω,and R4 = 7.00 Ω are combined as shown.What is the equivalent resistance for this combination?

Five resistors each have resistance R.Three of the resistors are connected in series and this combination is then connected in parallel with the two other resistors which have been connected in series with each other.What is the equivalent resistance for this arrangement?

The following three appliances are connected to a 120-V house circuit: i)toaster,1 325 W,ii)coffee pot,650 W,and iii)microwave,600 W.If all were operated at the same time,what total current would they draw?

What is the equivalent resistance for these 3.00-Ω resistors?

In circuits involving resistors and capacitors the quantity 63% often arises.Which of the following is equivalent to this quantity?

In an RC circuit using two capacitors in series with two resistors,which of the following combinations would give the greatest time constant?

Three resistors,each with resistance R1,are in series in a circuit.They are replaced by one equivalent resistor,R.Comparing this resistor to the first resistor of the initial circuit,which of the following is true?

The ammeter shown in the figure reads 4.4 A,R1 = 7.0 Ω,R2 = 5.0 Ω,and R3 = 2.0 Ω. -What is ε\varepsilonε ?

What is Kirchhoff's 1st equation for this junction?

If R1 < R2 < R3,and if these resistors are connected in series in a circuit,which one dissipates the greatest power?

A 10-V-emf battery is connected in series with the following: a 2-µF capacitor,a 2.0-Ω resistor,an ammeter,and a switch,initially open;a voltmeter is connected in parallel across the capacitor.At the instant the switch is closed,what are the current and capacitor voltage readings,respectively?

Three resistors connected in parallel have individual values of 4.0,6.0,and 10.0 Ω,respectively.If this combination is connected in series with a 12-V battery and a 2.0-Ω resistor,what is the current in the 10.0-Ω resistor?

What is the current through the 8.0-Ω resistor?

Resistors of values 10 Ω,14 Ω,and 23 Ω are connected in series across a battery with a small internal resistance.Which resistor dissipates the greatest power?

How much current is flowing in one of the 10-Ω resistors?

Three 7.0-Ω resistors are connected in series.What is their equivalent resistance?

Units, Trigonometry, and Vectors

Motion in One Dimension

Motion in Two Dimensions

Newtons Laws of Motion

Energy

Momentum, Impulse, and Collisions

Rotational Motion and Gravitation

Rotational Equilibrium and Dynamics

Fluids and Solids

Thermal Physics

Energy in Thermal Processes

The Laws of Thermodynamics

Vibrations and Waves

Sound

Electric Forces and Fields

Electrical Energy and Capacitance

Current and Resistance

Magnetism

Induced Voltages and Inductance

Alternating-Current Circuits and Electromagnetic Waves

Reflection and Refraction of Light

Mirrors and Lenses

Wave Optics

Optical Instruments

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics

Nuclear Energy and Elementary Particles

Filters

Resistors of values R₁ = 6.00 Ω,R₂ = 4.00 Ω,R₃ = 10.0 Ω,and R₄ = 7.00 Ω are combined as shown.What is the equivalent resistance for this combination?

Three resistors,each with resistance R₁,are in series in a circuit.They are replaced by one equivalent resistor,R.Comparing this resistor to the first resistor of the initial circuit,which of the following is true?

The ammeter shown in the figure reads 4.4 A,R₁ = 7.0 Ω,R₂ = 5.0 Ω,and R₃ = 2.0 Ω. $The ammeter shown in the figure reads 4.4 A,R<sub>1</sub> = 7.0 Ω,R<sub>2</sub> = 5.0 Ω,and R<sub>3</sub> = 2.0 Ω. -What is \varepsilon ?$ -What is $\varepsilon$ ?

If R₁ < R₂ < R₃,and if these resistors are connected in series in a circuit,which one dissipates the greatest power?