Question is ⇒ The arrangement of 12 cells, each of internal resistance 1.5 ω, to give maximum current in external load resistance of 2 ω will be, Options are ⇒ (A) all 12 cells in series., (B) all 12 cells in parallel., (C) 4 cells in series with 3 rows in parallel., (D) 3 cells in series with 4 rows in parallel., (E) , Leave your comments or Download question paper.

Question is ⇒ The arrangement of 12 cells, each of internal resistance 1.5 ω, to give maximum current in external load resistance of 2 ω will be, Options are ⇒ (A) all 12 cells in series., (B) all 12 cells in parallel., (C) 4 cells in series with 3 rows in parallel., (D) 3 cells in series with 4 rows in parallel., (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The arrangement of 12 cells, each of internal resistance 1.5 ω, to give maximum current in external load resistance of 2 ω will be
A.	all 12 cells in series. [Wrong Answer]
B.	all 12 cells in parallel. [Wrong Answer]
C.	4 cells in series with 3 rows in parallel. [Correct Answer]
D.	3 cells in series with 4 rows in parallel. [Wrong Answer]
View Answer 7 -5 Explanation:- Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ Addition of which of the following substances in electrolyte promotes smooth deposition?
Albumen.
Glucose.
Phenol.
Any of these.

⇒ Overcharging of a lead acid battery would cause
excessive gassing.
loss of active material.
increase in temperature resulting in buckling of plates.
all of the above.

⇒ For keeping the lead acid battery terminals free from corrosion it is advisable to
keep electrolyte level low
apply petroleum jelly.
charge the battery at frequent intervals.

⇒ The emf of primary cell depends upon the
physical dimensions of a cell.
nature of electrolyte.
nature of electrode.
both (b) and (c).

⇒ Whithin the electric cell, the charge is transported by
Free electrons
Only positive ions
Only negative ions
Both positive and negative ions

⇒ The arrangement of 12 cells, each of internal resistance 1.5 ω, to give maximum current in external load resistance of 2 ω will be
all 12 cells in series.
all 12 cells in parallel.
4 cells in series with 3 rows in parallel.
3 cells in series with 4 rows in parallel.

⇒ For a group of cells when internal resistance of the group is equal to external load resistance, the group will deliver maximum
voltage.
current.
ampere-hours.
efficiency.

⇒ What happens during the charging of acid cell ?
Voltage increases
Energy is given out
Both
None of these

⇒ Nickel-cadmium accumulators in comparison to nickel-iron accumulators have the advantages of
being lighter in weight and cheaper in cost.
low internal resistance and longer life.
higher emf and higher efficiency.
all of the above.

⇒ During discharging of lead acid cells, the terminal voltage decreases with the decrease in
temperature.
discharge rate.
state of charge.
none of these.

⇒ Capacity of a dry cell is
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more when it supplies current intermittently.
not affected by the type of discharge.
none of the above.

⇒ Common impurity in a battery electrolyte is
dust particles.
iron.
lead crystals.
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1.80
1.50
1.28
1.18

⇒ Cells are connected in parallel in order to increase the
life of the cells.
efficiency.
current capacity.
voltage rating.

⇒ The capacity of a lead acid battery is adversely affected by increase in
discharge rate.
charge rate.
temperature.
specific gravity of the electrolyte.

⇒ In a lead acid battery, excessive formation of lead sulphate occurs due to
idleness of battery for a long time.
low level of electrolyte.
persistent undercharging.
all of the above.

⇒ For achieving uniform thickness of deposit on irregular surface
anode and cathode are kept farther apart
anode and cathode are kept closer.
high current densities are used.
electrolyte is agitated constantly

⇒ Pickling is
protection of surface from rusting.
a layer coating for preventing surface deterioration.
removal of scale, grease etc. from the surface.
none of the above.

⇒ What carries current in an electrolyte
Electrons only
- ve ions only
+ ve ions only
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⇒ Through an electrolyte an electric current is due to drift of
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Free electrons and holes
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⇒ Oil and grease can be removed from a surface with the help of
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hot alkaline solutions.
solvents such as gasoline or carbon tetrachioride.
any of the above.

⇒ Short circuiting of a cell may be caused by
buckling of plates.
breakdown of one or more separators.
excessive accumulation of sediments at the bottom of the cell.
lead particles forming circuits between positive and negative plates.

⇒ Which of the following is not the name of a secondary cell ?
Acid cell
Alkali cell
Fuel cell
Storage cell

⇒ During electroplating the weight of a substance deposited depends upon
shape of the article
quantity of electricity
room temperature
all of the above

⇒ In comparison to constant current charging method, the constant voltage charging method of charging a lead acid battery has the advantage(s) of
increasing capacity of the battery.
reducing charging time.
avoiding of excessive gassing.
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ampere hours.
joules.

⇒ In which of the following cells polarisation is the major defect ?
Voltanic cell
Lechlanche cell
Daniel cell
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⇒ Who was the first to design storage cell ?
Plante
Galvani
Edison
Volta

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electrolyte does not take part in chemical reaction.
emf remains the same.
corrosive fumes are produced.
nickel hydroxide remains unsplit.

⇒ Short circuiting of a cell results in
reduced gassing during charging.
abnormal high temperature.
low specific gravity of the electrolyte.
all of the above.