Question 1

The charge flowing through a light bulb attached to a 12.0-V battery in 13.0 s is 30.0 C.What is the average power supplied by the battery during this process?

Accepted Answer

A) 360 W 
B) 12.0 W 
C) 27.7 W 
D) 5.20 W 
E) 30.0 W 
A) 360 W 
B) 12.0 W 
C) 27.7 W 
D) 5.20 W 
E) 30.0 W

Question 2

A wire carries a steady current of 0.30 A over a period of 20 s.What total charge passes through the wire in this time interval?

Accepted Answer

A) 67 C 
B) 20 C 
C) 6.0 C 
D) 0.015 C 
E) 0.30 C 
A) 67 C 
B) 20 C 
C) 6.0 C 
D) 0.015 C 
E) 0.30 C

Question 3

When current is flowing in a superconductor,which statement is not true?

Accepted Answer

A) A battery is needed to keep the current going. 
B) Electrical charges are moving. 
C) The resistance is zero. 
D) No power is given off in the form of heat. 
A) A battery is needed to keep the current going. 
B) Electrical charges are moving. 
C) The resistance is zero. 
D) No power is given off in the form of heat.

Question 4

The temperature coefficient of resistivity is a quantity that is:

Accepted Answer

A) always positive. 
B) always non-negative. 
C) sometimes negative. 
D) represented by the symbol σ. 
A) always positive. 
B) always non-negative. 
C) sometimes negative. 
D) represented by the symbol σ.

Question 5

Resistor A has twice the resistance of resistor B.When individually connected across a given potential difference,which one dissipates the most power;and when connected in series across the same potential difference,which one dissipates the most power?

Accepted Answer

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

Question 6

To measure the current through and the voltage across a resistor in a circuit,you should place the ammeter in _____ with the resistor and the voltmeter in _____ with the resistor.

Accepted Answer

A) series,series 
B) parallel,series 
C) parallel,parallel 
D) series,parallel 
A) series,series 
B) parallel,series 
C) parallel,parallel 
D) series,parallel

Question 7

Superconductivity was discovered by:

Accepted Answer

A) Volta. 
B) Ohm. 
C) Onnes. 
D) Bednorz and Müller. 
A) Volta. 
B) Ohm. 
C) Onnes. 
D) Bednorz and Müller.

Question 8

A light bulb has resistance of 175 Ω when operating at 100 V.Find the current in the light bulb.

Accepted Answer

A) 1.8 A 
B) 0.33 A 
C) 0.57 A 
D) 0.76 A 
E) 1.3 A 
A) 1.8 A 
B) 0.33 A 
C) 0.57 A 
D) 0.76 A 
E) 1.3 A

Question 9

A 500-W heater carries a current of 4.0 A.How much does it cost to operate the heater for 30 min if electrical energy costs 6.0 cents per kWh?

Accepted Answer

A) 1.5 cents 
B) 9 cents 
C) 6.0 cents 
D) 0.042 cents 
E) 30 cents 
A) 1.5 cents 
B) 9 cents 
C) 6.0 cents 
D) 0.042 cents 
E) 30 cents

Question 10

Which is a unit of power?

Accepted Answer

A) kWh 
B) W/s 
C) A⋅Ω 
D) J/s 
A) kWh 
B) W/s 
C) A⋅Ω 
D) J/s

The charge flowing through a light bulb attached to a 12.0-V battery in 13.0 s is 30.0 C.What is the average power supplied by the battery during this process?

A wire carries a steady current of 0.30 A over a period of 20 s.What total charge passes through the wire in this time interval?

When current is flowing in a superconductor,which statement is not true?

The temperature coefficient of resistivity is a quantity that is:

Resistor A has twice the resistance of resistor B.When individually connected across a given potential difference,which one dissipates the most power;and when connected in series across the same potential difference,which one dissipates the most power?

To measure the current through and the voltage across a resistor in a circuit,you should place the ammeter in _ with the resistor and the voltmeter in _ with the resistor.

Superconductivity was discovered by:

A light bulb has resistance of 175 Ω when operating at 100 V.Find the current in the light bulb.

A 500-W heater carries a current of 4.0 A.How much does it cost to operate the heater for 30 min if electrical energy costs 6.0 cents per kWh?

Which is a unit of power?

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

Direct-Current Circuits

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

Exam 17: Current and Resistance

The charge flowing through a light bulb attached to a 12.0-V battery in 13.0 s is 30.0 C.What is the average power supplied by the battery during this process?

A wire carries a steady current of 0.30 A over a period of 20 s.What total charge passes through the wire in this time interval?

When current is flowing in a superconductor,which statement is not true?

The temperature coefficient of resistivity is a quantity that is:

Resistor A has twice the resistance of resistor B.When individually connected across a given potential difference,which one dissipates the most power;and when connected in series across the same potential difference,which one dissipates the most power?

To measure the current through and the voltage across a resistor in a circuit,you should place the ammeter in _____ with the resistor and the voltmeter in _____ with the resistor.

Superconductivity was discovered by:

A light bulb has resistance of 175 Ω when operating at 100 V.Find the current in the light bulb.

A 500-W heater carries a current of 4.0 A.How much does it cost to operate the heater for 30 min if electrical energy costs 6.0 cents per kWh?

Which is a unit of power?

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

Direct-Current Circuits

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

To measure the current through and the voltage across a resistor in a circuit,you should place the ammeter in _ with the resistor and the voltmeter in _ with the resistor.