Question 1

What is the equivalent capacitance of the combination of capacitors shown in the circuit?

Accepted Answer

A) 0.37 µF 
B) 3.3 µF 
C) 4.6 µF 
D) 0.67 µF 
E) 2.1 µF 
A) 0.37 µF 
B) 3.3 µF 
C) 4.6 µF 
D) 0.67 µF 
E) 2.1 µF

Question 2

A 3.0-A current is maintained in a simple circuit that consists of a resistor between the terminals of an ideal battery.If the battery supplies energy at a rate of 25 W,how large is the resistance?

Accepted Answer

A) 0.40   
B) 0.80   
C) 2.4   
D) 4.2   
E) 8.8   
A) 0.40   
B) 0.80   
C) 2.4   
D) 4.2   
E) 8.8

Question 3

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V.
  
-How much energy is dissipated in the 1.8-  resistor in 4.0 seconds?

Accepted Answer

A) 18 J 
B) 28 J 
C) 55 J 
D) 64 J 
E) 93 J 
A) 18 J 
B) 28 J 
C) 55 J 
D) 64 J 
E) 93 J

Question 4

Four resistors and a 6-V battery are arranged as shown in the circuit diagram.
  
-Determine the equivalent resistance for this circuit.

Accepted Answer

A) 50   
B) 120   
C) 29   
D) 5   
E) 12   
A) 50   
B) 120   
C) 29   
D) 5   
E) 12

Question 5

When a 1500-W hair dryer is in use,the current passing through the dryer may be represented as  .What is the rms current for this circuit?

Accepted Answer

A) 17.7 A 
B) 12.5 A 
C) 85.7 A 
D) 25.0 A 
A) 17.7 A 
B) 12.5 A 
C) 85.7 A 
D) 25.0 A

Question 6

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V.
  
-What is the current in the 3.6-  resistor?

Accepted Answer

A) 1.3 A 
B) 1.7 A 
C) 2.9 A 
D) 3.5 A 
E) 15 A 
A) 1.3 A 
B) 1.7 A 
C) 2.9 A 
D) 3.5 A 
E) 15 A

Question 7

The figure shows a simple RC circuit consisting of a 10.0-µF capacitor in series with a resistor.Initially,the switch is open as suggested in the figure.The capacitor has been charged so that the potential difference between its plates is 100.0 V.At t = 0 s,the switch is closed.The capacitor discharges exponentially so that 2.0 s after the switch is closed,the potential difference between the capacitor plates is 37 V.In other words,in 2.0 s the potential difference between the capacitor plates is reduced to 37 % of its original value.
  
-Determine the potential drop across the resistor R at t = 2.0 s (i.e. ,two seconds after the switch is closed).

Accepted Answer

A) zero volts 
B) 37 V 
C) 63 V 
D) 87 V 
E) 100 V 
A) zero volts 
B) 37 V 
C) 63 V 
D) 87 V 
E) 100 V

Question 8

The resistivity of a silver wire with a radius of 5.04 × 10-⁴   is 1.59 × 10-⁸ W × m.If the length of the wire is 3.00 m,what is the resistance of the wire?

Accepted Answer

A) 0.0598   
B) 47.0 µ  
C) 9.46 µ  
D) 0.167   
E) 1.88   
A) 0.0598   
B) 47.0 µ  
C) 9.46 µ  
D) 0.167   
E) 1.88

Question 9

A resistor dissipates 1.5 W when it is connected to a battery with a potential difference of 12 V.What is the resistance of the resistor?

Accepted Answer

A) 0.13   
B) 220   
C) 18   
D) 8.0   
E) 96   
A) 0.13   
B) 220   
C) 18   
D) 8.0   
E) 96

Question 10

The characteristics of five wires are given in the table.
  The gauge is a measure of the diameter of the wire;and #18 corresponds to a diameter of 1.2 × 10S1U1P1-S1S1P0³ m;and #22 corresponds to a diameter of 6.4 × 10S1U1P1-S1S1P0⁴ m.The resistivity of iron is 9.7 × 10S1U1P1-S1S1P0⁸  × m;and the value for copper is 1.72 × 10S1U1P1-S1S1P0⁸   × m.
-Which one of the wires carries the smallest current when they are connected to identical batteries?

Accepted Answer

A) wire E 
B) wire D 
C) wire C 
D) wire B 
E) wire A 
A) wire E 
B) wire D 
C) wire C 
D) wire B 
E) wire A

Question 11

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V.
  
-How much current flows through the 3-  resistor?

Accepted Answer

A) 2.0 A 
B) 4.0 A 
C) 6.0 A 
D) 8.7 A 
E) 10.0 A 
A) 2.0 A 
B) 4.0 A 
C) 6.0 A 
D) 8.7 A 
E) 10.0 A

Question 12

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities:
V₁ = V₂ = 12 V
R₁ = R₄ = 1.0 W
R₂ = R₃ = 2.0 W
  
-Determine the current through R₁ when the switch S is closed on A.

Accepted Answer

A) 1 A 
B) 2 A 
C) 3 A 
D) 6 A 
E) 12 A 
A) 1 A 
B) 2 A 
C) 3 A 
D) 6 A 
E) 12 A

Question 13

A battery has a terminal voltage of 12 V when no current flows and an internal resistance of 2  .The battery is placed in series with a 1-  resistor.Which one of the entries in the following table is correct?

Accepted Answer

The answer of A battery has a terminal voltage of...

Question 14

An RC circuit consists of a resistor with resistance 1.0  ,a 120-V battery,and two capacitors,C₁ and C₂,with capacitances of 20.0 µF and 60.0 µF,respectively.Initially,the capacitors are uncharged;and the switch is closed at t = 0 s.
-What is the current through the resistor a long time after the switch is closed? Recall that current is the charge per unit time that flows in a circuit.

Accepted Answer

A) 0.60 A 
B) 0.12 A 
C) 0.24 A 
D) 0.48 A 
E) zero amperes 
A) 0.60 A 
B) 0.12 A 
C) 0.24 A 
D) 0.48 A 
E) zero amperes

Question 15

An uncharged 5.0-µF capacitor and a resistor are connected in series to a 12-V battery and an open switch to form a simple RC circuit.The switch is closed at t = 0 s.The time constant of the circuit is 4.0 s.
-What is the charge remaining on either plate after one time constant has elapsed?

Accepted Answer

A) 7.4 × 10-⁵ C 
B) 5.5 × 10-⁵ C 
C) 1.2 × 10-⁵ C 
D) 3.8 × 10-⁵ C 
E) 2.2 × 10-⁵ C 
A) 7.4 × 10-⁵ C 
B) 5.5 × 10-⁵ C 
C) 1.2 × 10-⁵ C 
D) 3.8 × 10-⁵ C 
E) 2.2 × 10-⁵ C

Question 16

A 220-  resistor is connected across an ac voltage source  What is the average power delivered to this circuit?

Accepted Answer

A) 51 W 
B) 110 W 
C) 280 W 
D) 320 W 
E) 550 W 
A) 51 W 
B) 110 W 
C) 280 W 
D) 320 W 
E) 550 W

Question 17

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V.
  
-How much current flows through the 2-  resistor?

Accepted Answer

A) 2.0 A 
B) 4.0 A 
C) 6.0 A 
D) 8.7 A 
E) 10.0 A 
A) 2.0 A 
B) 4.0 A 
C) 6.0 A 
D) 8.7 A 
E) 10.0 A

Question 18

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V.
  
-What is the current through the 30- resistor?

Accepted Answer

A) 0.3 A 
B) 0.5 A 
C) 0.7 A 
D) 1 A 
E) 2 A 
A) 0.3 A 
B) 0.5 A 
C) 0.7 A 
D) 1 A 
E) 2 A

Question 19

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet.
  
-What is the approximate average power dissipated in the iron?

Accepted Answer

A) 450 W 
B) 600 W 
C) 850 W 
D) 1200 W 
E) 1700 W 
A) 450 W 
B) 600 W 
C) 850 W 
D) 1200 W 
E) 1700 W

Question 20

An ac current has an rms value of 3.54 A.Determine the peak value of the current.

Accepted Answer

A) 1.25 A 
B) 2.50 A 
C) 3.75 A 
D) 5.00 A 
E) 7.08 A 
A) 1.25 A 
B) 2.50 A 
C) 3.75 A 
D) 5.00 A 
E) 7.08 A

What is the equivalent capacitance of the combination of capacitors shown in the circuit?

A 3.0-A current is maintained in a simple circuit that consists of a resistor between the terminals of an ideal battery.If the battery supplies energy at a rate of 25 W,how large is the resistance?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -How much energy is dissipated in the 1.8- resistor in 4.0 seconds?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -Determine the equivalent resistance for this circuit.

When a 1500-W hair dryer is in use,the current passing through the dryer may be represented as .What is the rms current for this circuit?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V. -What is the current in the 3.6- resistor?

The resistivity of a silver wire with a radius of 5.04 × 10^-⁴ is 1.59 × 10^-⁸ W × m.If the length of the wire is 3.00 m,what is the resistance of the wire?

A resistor dissipates 1.5 W when it is connected to a battery with a potential difference of 12 V.What is the resistance of the resistor?

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -How much current flows through the 3- resistor?

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities: V₁ = V₂ = 12 V R₁ = R₄ = 1.0 W R₂ = R₃ = 2.0 W -Determine the current through R₁ when the switch S is closed on A.

A battery has a terminal voltage of 12 V when no current flows and an internal resistance of 2 .The battery is placed in series with a 1-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11 resistor.Which one of the entries in the following table is correct?

An uncharged 5.0-µF capacitor and a resistor are connected in series to a 12-V battery and an open switch to form a simple RC circuit.The switch is closed at t = 0 s.The time constant of the circuit is 4.0 s. -What is the charge remaining on either plate after one time constant has elapsed?

A 220- resistor is connected across an ac voltage source What is the average power delivered to this circuit?

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -How much current flows through the 2- resistor?

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the current through the 30-resistor?

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet. -What is the approximate average power dissipated in the iron?

An ac current has an rms value of 3.54 A.Determine the peak value of the current.

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electromagnetic Induction

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Particles and Waves

Filters

Exam 20: Electric Circuits

What is the equivalent capacitance of the combination of capacitors shown in the circuit?

A 3.0-A current is maintained in a simple circuit that consists of a resistor between the terminals of an ideal battery.If the battery supplies energy at a rate of 25 W,how large is the resistance?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 25 V. -How much energy is dissipated in the 1.8- resistor in 4.0 seconds?

Four resistors and a 6-V battery are arranged as shown in the circuit diagram. -Determine the equivalent resistance for this circuit.

When a 1500-W hair dryer is in use,the current passing through the dryer may be represented as .What is the rms current for this circuit?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V. -What is the current in the 3.6- resistor?

The resistivity of a silver wire with a radius of 5.04 × 10-⁴ is 1.59 × 10-⁸ W × m.If the length of the wire is 3.00 m,what is the resistance of the wire?

A resistor dissipates 1.5 W when it is connected to a battery with a potential difference of 12 V.What is the resistance of the resistor?

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -How much current flows through the 3- resistor?

The figure shows a circuit.The switch S can be closed on either point A or C,but not both at the same time.Use the following quantities: V₁ = V₂ = 12 V R₁ = R₄ = 1.0 W R₂ = R₃ = 2.0 W -Determine the current through R₁ when the switch S is closed on A.

A battery has a terminal voltage of 12 V when no current flows and an internal resistance of 2 .The battery is placed in series with a 1-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11 resistor.Which one of the entries in the following table is correct?

An uncharged 5.0-µF capacitor and a resistor are connected in series to a 12-V battery and an open switch to form a simple RC circuit.The switch is closed at t = 0 s.The time constant of the circuit is 4.0 s. -What is the charge remaining on either plate after one time constant has elapsed?

A 220- resistor is connected across an ac voltage source What is the average power delivered to this circuit?

Three resistors are connected as shown in the figure.The potential difference between points A and B is 26 V. -How much current flows through the 2- resistor?

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the current through the 30-resistor?

The figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V,60 Hz outlet. -What is the approximate average power dissipated in the iron?

An ac current has an rms value of 3.54 A.Determine the peak value of the current.

Fluids

The Transfer of Heat

The Ideal Gas Law and Kinetic Theory

Thermodynamics

The Principle of Linear Superposition and Interference Phenomena

Electromagnetic Induction

The Refl Ection of Light: Mirrors

The Refraction of Light: Lenses and Optical Instruments

Particles and Waves

Filters

The resistivity of a silver wire with a radius of 5.04 × 10^-⁴ is 1.59 × 10^-⁸ W × m.If the length of the wire is 3.00 m,what is the resistance of the wire?