An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :

A Power transmittor
B Battery
C Uninterrupted power supply (UPS)
D Generator

Correct Answer: Battery

A Galvanic cell, also known as battery, is an electrochemical cell that derives electrical energy from spontaneous redox reactions taking place within the cell. It is typically used as a source of electrical power. By their nature, they produce direct current. A battery is a set of galvanic cells that are connected in parallel.
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Related Questions

A,B,C,D,E,G and I are seven friends who study in three different standards namely 5th, 6th and 7th such that not less than two friends study in the same standard. Each friend also has a different favorite subject namely History, Civics, English, Bangla, Science , Maths , and Economics but not necessarily in the same order. A likes Maths and studies in the 5th standard with only one other friend who likes Bangla. I studies with tow other friends . Both the friends who study with I like languages (Here languages include only Science , English and Bangla ) . D studies in the 6th standard with only one person and does not like Civics . E studies with only one friend . The one who likes history does not study in 5th or 6th standard . E does not like languages. C does not like English , Science or Civics. Which combination represents E's favorite subject and the standard in which he studies?
A Civics and 7th
B Economics and 5th
C Civics and 6th
D History and 7th
Fe(s) |Fe2+ (aq) || Br2 (l) ; Br- (aq)| Pt(s) তড়িৎ রাসায়নিক কোষের সঠিক কোষ-বিক্রিয়া কোনটি? (Which one is the correct cell reaction of the given electrochemical cell?)
A Fe+Br2→Fe2++2Br-
B Fe+2Br-→Fe2++2Br2
C Fe2++Br2→Fe+2Br-
D Fe+Br2→Fe3++2Br-
Fes|Fe2+aq∥Br2I; Br-aq| pts তড়িৎ রাসায়নিক কোষের সঠিক কোষ-বিক্রিয়া কোনটি? (Which one is the correct cell reaction of the given electrochemical cell?)
A Fe+Br2→Fe2++2Br
B Fe+2Br-→Fe2++Br2
C Fe2++Br2→Fe+2Br
D Fe+Br2→Fe3++2Br
As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
A reducing time of charging
B increasing cell capacity
C both (A) and (B)
D avoiding excessive gassing
The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:
A rotor
B armature
C battery
D commutator
E None of the above
The cathode in an electrochemical cell always carries
A negative charge
B positive charge
C zero charge
D positive or negative charge depending upon the nature of the cell
একটি কোষের তড়িৎচালক বল 2 V। এতে যখন 1 A তড়িৎ প্রবাহিত হয় তখন এর বিভব পার্থক্য 1 v হয়। কোষের অভ্যন্তরীণ রোধ (Electromotive force of a cell is 2 V. When 1 A current flows through it, its voltage drops to 1 V. The internal resistance of the cell is)
A 1 Ω
B 2 Ω
C 1 2Ω
D 1 4Ω
You cannot convert a voltage source to an equivalent current source, or vice versa.
A True
B False
Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant
A Humidity
B Velocity
C Temperature
D All of the above
For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
A Dry bulb temperature
B Wet bulb temperature
C Humidity
D Relative saturation

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