Question 1

Which one of the following combinations of units is equivalent to the ohm?

Accepted Answer

A) V/C 
B) A/J 
C) J/s 
D) J×s/C² 
E) W/A 
A) V/C 
B) A/J 
C) J/s 
D) J×s/C² 
E) W/A

Question 2

A 75-W and 50-W incandescent light bulbs are designed for use with the same voltage.What is the ratio of the resistance of the 75-W bulb to the resistance of the 50-W bulb?

Accepted Answer

A) 1.5 
B) 0.67 
C) 2.3 
D) 0.44 
E) 3.0 
A) 1.5 
B) 0.67 
C) 2.3 
D) 0.44 
E) 3.0

Question 3

A non-ideal battery has a 6.0-V emf and an internal resistance of 0.6  .Determine the terminal voltage when the current drawn from the battery is 0.5 A.

Accepted Answer

A) 5.0 V 
B) 6.0 V 
C) 5.4 V 
D) 6.6 V 
E) 5.7 V 
A) 5.0 V 
B) 6.0 V 
C) 5.4 V 
D) 6.6 V 
E) 5.7 V

Question 4

A battery supplies a total charge of 5.0   to a circuit that consists of a series combination of two identical capacitors,each with capacitance (C). Determine the charge on either capacitor.

Accepted Answer

A) 5.  
B) 2.5   
C) 1.5   
D) 1.0   
E) 0.50   
A) 5.  
B) 2.5   
C) 1.5   
D) 1.0   
E) 0.50

Question 5

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V.
  
-What is the potential drop across the 10- resistor?

Accepted Answer

A) 10 V 
B) 20 V 
C) 30 V 
D) 60 V 
E) 100 V 
A) 10 V 
B) 20 V 
C) 30 V 
D) 60 V 
E) 100 V

Question 6

Which one of the following circuits has the largest resistance?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 7

Three 15- and two 25-  light bulbs and a 24 V battery are connected in a series circuit.What is the current that passes through each bulb?

Accepted Answer

A) 0.18 A 
B) 0.25 A 
C) 0.51 A 
D) 0.74 A 
E) The current will be 1.6 A in the 15-  bulbs and 0.96 A in the 25-  bulbs. 
A) 0.18 A 
B) 0.25 A 
C) 0.51 A 
D) 0.74 A 
E) The current will be 1.6 A in the 15-  bulbs and 0.96 A in the 25-  bulbs.

Question 8

Two wires,A and B,and a variable resistor,R,are connected in series to a battery.Which one of the following results will occur if the resistance of R is increased?

Accepted Answer

A) The current through A and B will increase. 
B) The voltage across A and B will increase. 
C) The voltage across the entire circuit will increase. 
D) The power used by the entire circuit will increase. 
E) The current through the entire circuit will decrease. 
A) The current through A and B will increase. 
B) The voltage across A and B will increase. 
C) The voltage across the entire circuit will increase. 
D) The power used by the entire circuit will increase. 
E) The current through the entire circuit will decrease.

Question 9

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V.
  
-What amount of energy is dissipated in the 2.7-  resistor in 9.0 seconds?

Accepted Answer

A) 15 J 
B) 24 J 
C) 29 J 
D) 36 J 
E) 52 J 
A) 15 J 
B) 24 J 
C) 29 J 
D) 36 J 
E) 52 J

Question 10

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 time constant of the circuit?

Accepted Answer

A) 1.0 × 10-² s 
B) 2.0 × 10-² s 
C) 6.0 × 10-² s 
D) 8.0 × 10-² s 
E) 3.0 × 10-¹ s 
A) 1.0 × 10-² s 
B) 2.0 × 10-² s 
C) 6.0 × 10-² s 
D) 8.0 × 10-² s 
E) 3.0 × 10-¹ s

Question 11

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 numerical value of the resistance R.

Accepted Answer

A) 1.0 × 10⁵   
B) 2.0 × 10⁵   
C) 5.0 × 10⁵   
D) 1.0 × 10⁶   
E) 2.5 × 10⁶   
A) 1.0 × 10⁵   
B) 2.0 × 10⁵   
C) 5.0 × 10⁵   
D) 1.0 × 10⁶   
E) 2.5 × 10⁶

Question 12

Three resistors,50- ,120- ,180- ,are connected in series in a circuit.What is the equivalent resistance of this combination of resistors?

Accepted Answer

A) 350   
B)   
C) 200   
D)   
E)   
A) 350   
B)   
C) 200   
D)   
E)

Question 13

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 rms value of the current in this circuit?

Accepted Answer

A) 1.4 A 
B) 7.1 A 
C) 11 A 
D) 14 A 
E) 18 A 
A) 1.4 A 
B) 7.1 A 
C) 11 A 
D) 14 A 
E) 18 A

Question 14

Which one of the following statements concerning resistance is true?

Accepted Answer

A) The resistance of a semiconductor increases with temperature. 
B) Resistance is a property of resistors,but not conductors. 
C) The resistance of a metal wire changes with temperature. 
D) The resistance is the same for all samples of the same material. 
E) The resistance of a wire is inversely proportional to the length of the wire. 
A) The resistance of a semiconductor increases with temperature. 
B) Resistance is a property of resistors,but not conductors. 
C) The resistance of a metal wire changes with temperature. 
D) The resistance is the same for all samples of the same material. 
E) The resistance of a wire is inversely proportional to the length of the wire.

Question 15

The figure shows a simple RC circuit consisting of a 100.0-V battery in series with a 10.0-µF capacitor and a resistor.Initially,the switch S is open and the capacitor is uncharged.Two seconds after the switch is closed,the voltage across the resistor is 37 V.
  
-How much charge is on the capacitor 2.0 s after the switch is closed?

Accepted Answer

A) 1.1 × 10-³ C 
B) 2.9 × 10-³ C 
C) 3.7 × 10-⁴ C 
D) 5.2 × 10-⁴ C 
E) 6.6 × 10-⁴ C 
A) 1.1 × 10-³ C 
B) 2.9 × 10-³ C 
C) 3.7 × 10-⁴ C 
D) 5.2 × 10-⁴ C 
E) 6.6 × 10-⁴ C

Question 16

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.
-Determine the maximum charge on the capacitor.

Accepted Answer

A) 6.0 × 10-⁵ C 
B) 9.5 × 10-⁵ C 
C) 1.5 × 10-⁵ C 
D) 4.8 × 10-⁵ C 
E) 5.5 × 10-⁵ C 
A) 6.0 × 10-⁵ C 
B) 9.5 × 10-⁵ C 
C) 1.5 × 10-⁵ C 
D) 4.8 × 10-⁵ C 
E) 5.5 × 10-⁵ C

Question 17

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

Accepted Answer

A) 1.5   
B) 4.8   
C) 8.7   
D) 10.4   
E) 11.  
A) 1.5   
B) 4.8   
C) 8.7   
D) 10.4   
E) 11.

Question 18

When a light bulb is connected to a 4.5 V battery,a current of 0.12 A passes through the bulb filament.What is the resistance of the filament?

Accepted Answer

A) 440   
B) 28   
C) 9.3   
D) 1.4   
E) 38   
A) 440   
B) 28   
C) 9.3   
D) 1.4   
E) 38

Question 19

Three resistors are connected in a circuit as shown.Using Kirchhoff's rules,determine the current in one of the 16-  resistors.

Accepted Answer

A) 0.50 A 
B) 0.75 A 
C) 1.0 A 
D) 1.3 A 
E) 2.0 A 
A) 0.50 A 
B) 0.75 A 
C) 1.0 A 
D) 1.3 A 
E) 2.0 A

Question 20

Three resistors,4.0- ,8.0- ,16- ,are connected in parallel in a circuit.What is the equivalent resistance of this combination of resistors?

Accepted Answer

A) 30   
B) 10   
C) 2.3   
D) 2.9   
E) 0.34   
A) 30   
B) 10   
C) 2.3   
D) 2.9   
E) 0.34

Which one of the following combinations of units is equivalent to the ohm?

A 75-W and 50-W incandescent light bulbs are designed for use with the same voltage.What is the ratio of the resistance of the 75-W bulb to the resistance of the 50-W bulb?

A non-ideal battery has a 6.0-V emf and an internal resistance of 0.6 .Determine the terminal voltage when the current drawn from the battery is 0.5 A.

A battery supplies a total charge of 5.0 to a circuit that consists of a series combination of two identical capacitors,each with capacitance (C). Determine the charge on either capacitor.

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the potential drop across the 10-resistor?

Which one of the following circuits has the largest resistance?

Three 15-and two 25-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11 light bulbs and a 24 V battery are connected in a series circuit.What is the current that passes through each bulb?

Two wires,A and B,and a variable resistor,R,are connected in series to a battery.Which one of the following results will occur if the resistance of R is increased?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V. -What amount of energy is dissipated in the 2.7- resistor in 9.0 seconds?

An RC circuit consists of a resistor with resistance 1.0 k,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 time constant of the circuit?

Three resistors,50-,120-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,180-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,are connected in series in a circuit.What is the equivalent resistance of this combination of resistors?

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 rms value of the current in this circuit?

Which one of the following statements concerning resistance is true?

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. -Determine the maximum charge on the capacitor.

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

When a light bulb is connected to a 4.5 V battery,a current of 0.12 A passes through the bulb filament.What is the resistance of the filament?

Three resistors are connected in a circuit as shown.Using Kirchhoff's rules,determine the current in one of the 16- resistors.

Three resistors,4.0-,8.0-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,16-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,are connected in parallel in a circuit.What is the equivalent resistance of this combination of resistors?

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Exam 20: Electric Circuits

Which one of the following combinations of units is equivalent to the ohm?

A 75-W and 50-W incandescent light bulbs are designed for use with the same voltage.What is the ratio of the resistance of the 75-W bulb to the resistance of the 50-W bulb?

A non-ideal battery has a 6.0-V emf and an internal resistance of 0.6 .Determine the terminal voltage when the current drawn from the battery is 0.5 A.

A battery supplies a total charge of 5.0 to a circuit that consists of a series combination of two identical capacitors,each with capacitance (C). Determine the charge on either capacitor.

Three resistors are placed in a circuit as shown.The potential difference between points A and B is 30 V. -What is the potential drop across the 10-resistor?

Which one of the following circuits has the largest resistance?

Three 15-and two 25-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11 light bulbs and a 24 V battery are connected in a series circuit.What is the current that passes through each bulb?

Two wires,A and B,and a variable resistor,R,are connected in series to a battery.Which one of the following results will occur if the resistance of R is increased?

Five resistors are connected as shown in the diagram.The potential difference between points A and B is 15 V. -What amount of energy is dissipated in the 2.7- resistor in 9.0 seconds?

An RC circuit consists of a resistor with resistance 1.0 k,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 time constant of the circuit?

Three resistors,50-,120-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,180-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,are connected in series in a circuit.What is the equivalent resistance of this combination of resistors?

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 rms value of the current in this circuit?

Which one of the following statements concerning resistance is true?

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. -Determine the maximum charge on the capacitor.

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

When a light bulb is connected to a 4.5 V battery,a current of 0.12 A passes through the bulb filament.What is the resistance of the filament?

Three resistors are connected in a circuit as shown.Using Kirchhoff's rules,determine the current in one of the 16- resistors.

Three resistors,4.0-,8.0-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,16-11ec9df9_9993_078f_8d20_65f11cb5b53c_TB6393_11,are connected in parallel in a circuit.What is the equivalent resistance of this combination of resistors?

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