Question 1

The major advantages associated with lithium-ion cells are

Accepted Answer

A)  high capacity/weight ratio 
B)  no 'memory effect' or 'voltage depression' problems 
C)  capable of large number of energizing/de-energizing cycles 
D)  all of the above 
A)  high capacity/weight ratio 
B)  no 'memory effect' or 'voltage depression' problems 
C)  capable of large number of energizing/de-energizing cycles 
D)  all of the above

Question 2

When three identical cells are connected in series, the resulting e.m.f. is __________ that of one cell

Accepted Answer

A)  one-third 
B)  the same as 
C)  three times 
A)  one-third 
B)  the same as 
C)  three times

Question 3

As a lead-acid cell de-energizes, its relative density

Accepted Answer

A)  remains approximately constant 
B)  increases towards 1.27 
C)  falls towards 1.17 
D)  increases towards 1.84. 
A)  remains approximately constant 
B)  increases towards 1.27 
C)  falls towards 1.17 
D)  increases towards 1.84.

Question 4

In a cell having electrodes of zinc and copper, the negative electrode is always the

Accepted Answer

A)  zinc electrode 
B)  copper electrode 
A)  zinc electrode 
B)  copper electrode

Question 5

The electromotive force developed by any chemical cell depends on how far apart the electrodes are

Accepted Answer

A)  in terms of their distance 
B)  in terms of their resistivities 
C)  on the electrochemical series 
A)  in terms of their distance 
B)  in terms of their resistivities 
C)  on the electrochemical series

Question 6

When three identical cells are connected in parallel, the resulting e.m.f. is __________ times that of one cell

Accepted Answer

A)  one-third 
B)  the same as 
C)  three times 
A)  one-third 
B)  the same as 
C)  three times

Question 7

The electrolyte used in a 'dry Leclanche' cell is a

Accepted Answer

A)  dilute sulfuric acid 
B)  manganese dioxide gel 
C)  manganese dioxide and powdered carbon 
D)  ammonium chloride gel 
A)  dilute sulfuric acid 
B)  manganese dioxide gel 
C)  manganese dioxide and powdered carbon 
D)  ammonium chloride gel

The major advantages associated with lithium-ion cells are

When three identical cells are connected in series, the resulting e.m.f. is __________ that of one cell

As a lead-acid cell de-energizes, its relative density

In a cell having electrodes of zinc and copper, the negative electrode is always the

The electromotive force developed by any chemical cell depends on how far apart the electrodes are

When three identical cells are connected in parallel, the resulting e.m.f. is __________ times that of one cell

The electrolyte used in a 'dry Leclanche' cell is a

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Practical Conductors and Insulators

Effect of Temperature Change Upon Resistance

Ohms Law of Constant Proportionality

Series, Parallel and Series-Parallel Circuits

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters

Exam 9: Cells and Batteries

The major advantages associated with lithium-ion cells are

When three identical cells are connected in series, the resulting e.m.f. is __________ that of one cell

As a lead-acid cell de-energizes, its relative density

In a cell having electrodes of zinc and copper, the negative electrode is always the

The electromotive force developed by any chemical cell depends on how far apart the electrodes are

When three identical cells are connected in parallel, the resulting e.m.f. is __________ times that of one cell

The electrolyte used in a 'dry Leclanche' cell is a

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Practical Conductors and Insulators

Effect of Temperature Change Upon Resistance

Ohms Law of Constant Proportionality

Series, Parallel and Series-Parallel Circuits

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters