Question is ⇒ Common impurity in a battery electrolyte is, Options are ⇒ (A) dust particles., (B) iron., (C) lead crystals., (D) sodium chloride., (E) , Leave your comments or Download question paper.

Question is ⇒ Common impurity in a battery electrolyte is, Options are ⇒ (A) dust particles., (B) iron., (C) lead crystals., (D) sodium chloride., (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Common impurity in a battery electrolyte is
A.	dust particles. [Wrong Answer]
B.	iron. [Correct Answer]
C.	lead crystals. [Wrong Answer]
D.	sodium chloride. [Wrong Answer]
View Answer 22 -18 Explanation:- Answer : B Discuss it below : Suraj Gupta Said on 2019-04-16 23:05:46 Which of the following is the non - linear V - I property? Suraj Gupta Said on 2019-04-16 08:52:09 Sulfated cells are shown by ....... !! 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, fillers are provided to
facilitate flow of gasses
prevent flow of gasses.
recover acid losses through vapours.
reduce tendency for polarisation.

⇒ 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.

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

⇒ 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

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

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

⇒ 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.

⇒ Which of the following statements is correct about lead acid batteries ?
It delivers current as soon as its components are put together.
Density of electrolyte increases while delivering current
lt does not deliver current on putting its components together until it is supplied electrical energy from an external source
It has lead as positive plates.

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

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

⇒ 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.

⇒ A 24 V battery of internal resistance r = 4 ω connected to a variable resistance R. The rate of heat dissipation in the resistor is maximum when the current drawn from the battery is I. The current drawn from the battery will be 1/2 when R is equal to
8 ω
12 ω
16 ω
20 ω

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

⇒ 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.

⇒ 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.

⇒ Sulphated cells are indicated by the
low specific gravity.
low voltage on discharge.
low capacity.
all of the above.

⇒ What causes lower efficiency of alkali cell as compared to the acid cell ?
Lower emf
Small amount of electrolyte
Longer life
Higher internal resistance

⇒ 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.

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

⇒ 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.

⇒ Which of the following substances on adding in electrolyte helps in producing bright finish?
Glycerine.
Dextrol.
Phenol.
Any of these.

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

⇒ The condition of a fully charged lead acid battery cannot be ascertained by
gassing.
voltage.
colour of the electrodes.
specific gravity of the electrolyte.

⇒ Internal resistance of primary cell varies
inversely with the distance between electrodes.
inversely with the surface area of electrodes.
directly with the distance between electrodes
with the nature of electrodes.

⇒ The capacity of a lead acid battery does not depend upon
charge rate.
discharge rate.
temperature.
density of electrolyte & quantity of active material.

⇒ 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.

⇒ The relative density of the electrolyte of acid accumulator should not be allowed to fall below
1.80
1.50
1.28
1.18

⇒ 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.

⇒ Which of the following statements is incorrect about lead acid batteries ?
The electrolyte in weak sulphuric acid.
When fully charged both of the plates become lead-per-oxide.
The number of plates is always odd.
The number of negative plates is one more than the number of positive plates.

⇒ Five cells are connected in series in a row and then four such rows are connected in parallel to feed the current to a resistive load of 1.25 ω. Each cell has an emf of 1.5 V with an internal resistance of 0.2 ω. The current through the load will be
3.33 A
23.33 A
5 A
1 A