Question is ⇒ The electric cell is a device to obtain, Options are ⇒ (A) Electrons, (B) Electric charge, (C) Electric energy from chemical energy, (D) Electric force, (E) , Leave your comments or Download question paper.

Question is ⇒ The electric cell is a device to obtain, Options are ⇒ (A) Electrons, (B) Electric charge, (C) Electric energy from chemical energy, (D) Electric force, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The electric cell is a device to obtain
A.	Electrons [Wrong Answer]
B.	Electric charge [Wrong Answer]
C.	Electric energy from chemical energy [Correct Answer]
D.	Electric force [Wrong Answer]
View Answer 7 -4 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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⇒ In a lead acid battery, the level of the electrolyte should be
equal to that of the plates.
below the level of plates.
above the level of plates.
none of the above.

⇒ A floating battery is one
which is charged and discharged simultaneously.
in which battery voltage is equal to charger voltage.
which supplies current intermittently and also during idle period gets charged.
none of the above.

⇒ Which of the following cells is more likely to be damaged due to short circuiting ?
Daniel cell
Dry Cell
Acid cell
Fuel cell

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

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

⇒ The current capacity of a cell is measured in
A
Ah
W
Wh

⇒ The electric cell is a device to obtain
Electrons
Electric charge
Electric energy from chemical energy
Electric force

⇒ In which of the following cells polarisation is the major defect ?
Voltanic cell
Lechlanche cell
Daniel cell
None of these

⇒ The ratio of the number of hydrogen to that of oxygen atoms liberated in the electrolysis of acidulated water is
1 : 4
1 : 2
2 : 1
4 : 1

⇒ In a lead acid battery, fillers are provided to
facilitate flow of gasses
prevent flow of gasses.
recover acid losses through vapours.
reduce tendency for polarisation.

⇒ 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.

⇒ Rust, scales and oxides can be removed from a surface with the help of
various acids.
alkali and salt solution.
mechanical abrasion.
electrolytic cleaning any 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.

⇒ Standard cell
will have precise and accurate constant voltage when current drawn from it is few microamperes only.
will have precise and accurate constant voltage when few milliamperes are drawn from it.
will continue to have constant voltage irrespective of loading conditions.
can supply voltages up to 10 V.

⇒ A battery is connected to a resistance causing a current of 0.5 A in the circuit. The current drops to 0.4 A when an additional resistance of 5 ω is connected in series. The current will drop to 0.2 A when the resistance is further increased by
10 ω
15 ω
25 ω
40 ω

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

⇒ 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.

⇒ What happens during the discharging of Edison cell ?
Relative density of electrolyte decreases
The emf does not change
The emf decreases
Relative density increases

⇒ What carries current in an electrolyte
Electrons only
- ve ions only
+ ve ions only
Both + ve and - ve ions

⇒ 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.

⇒ Which of the following tests is performed for ascertaining whether the battery plates are defective or not?
Specific gravity test.
High discharge test.
Cadmium test.
None of the above.

⇒ Vent plug is provided in each lead acid cell to
pour water or electrolyte when needed.
check the electrolyte level.
allow escape out of gases during charging.
all of the above.

⇒ 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.

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

⇒ Oil and grease can be removed from a surface with the help of
soaps.
hot alkaline solutions.
solvents such as gasoline or carbon tetrachioride.
any of the above.

⇒ If the specific gravity of the electrolyte in a lead acid cell increases beyond 1.23 there will be
loss of life.
loss of capacity.
increase in internal resistance.
corrosion of the grids of the plate.

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

⇒ In lead acid batteries, sedimentation occurs due to
idleness foralongeiperiod.
overcharging at slow rate.
overcharging at high rate
slow charging at low rate.

⇒ Charging of a sulphated battery at high rate causes
warping of plates.
boiling of electrolyte owing to gassing.
damage to separators, cell caps, covers and battery case due to excessive temperature.
all of the above.

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