Cell and Batteries top questions

1➤ Which device converts sunlight into electrical energy

Light emitting diodeLight dependent resistorLiquid crystal diodePhoto voltaic cell |

2➤ What is the output voltage of lithium cell?

1.5 V 2.5 V1.8 V1.2 V

3➤ What is the method of charging if the battery is to be charged for short duration at higher rate?

Freshening chargeTrickle charge Boost chargeInitial charge

4➤ How the capacity of batteries is specified?

Ampere hour Volt AmpereWattVolt

5➤ What is the name of defect that bending of plates in secondary cells?

Hard sulphation Partial shortLocal actionBuckling

6➤ Which electrolyte used in carbon zinc dry cells?

Concentrated hydrochloric acidAmmonium chloridePotassium hydroxideDilute sulphuric acid

7➤ Which technique is used to control the corrosion of a metal surface?

Electrostatic protectionElectrolytic protectionAnodic protection Cathodic protection

8➤ Which material is used to make negative plates in lead acid battery?

Lead dioxideLead peroxideLead sulphateSponge lead

9➤ Which material is used as cathode (-ve) electrode in silver oxide battery?

Silver oxideCarbonZincCopper

10➤ What is the Electro Chemical Equivalent (ECE) of silver?

1.1182 mg/coulomb0.1182 mg/coulomb0.01182 mg/coulomb0.001182 mg/coulomb

11➤ What is the outcome at the positive plate, after the chemical reaction in lead acid battery during charging?

Lead peroxide(PbO2) Lead sulphate + water Sponge lead(Pb) Lead sulphate(PbSO4)

12➤ Which is used as an electrolyte in lead acid battery?

Potassium hydroxideDiluted sulphuric acidAmmonium chloride Hydrochloric acid

13➤ Which cell is most often used in digital watches? | डडक्र्टल घडड़यों मेंसजमजन्यिः कौन सज सेल प्रयोग होिज है? A | िोल्टेइक B | ललथथयम C | पजरज D

Silver oxide MercuryLithiumVoltaic

14➤ What is the function of fine selector switch in battery charger?

Selection of current ratingSelection of charging timeBoth a and bNone of these

15➤ What is the formula for Faraday’s first law of electrolysis?

M = ZitM = Z/it M = Zt/iM = it/ Z

16➤ What purpose the hydrometer is used during charging of battery?

Assess the discharge level of batteryDetermine the specific gravity of electrolyteAssess the battery voltage levelDetermine the AH capacity

17➤ Which part is losing electron during electrolysis?

SeperatorAnodeCathodeElectrolyte

18➤ Which is the cause for buckling defect in lead acid battery?

Charging with low rate for short periodFormation of sediments falling from the plate Overcharging or over dischargingBattery is kept in discharged condition for long period

19➤ What is the Electro Chemical Equivalent (ECE) of copper?

1.1182 g/ coulomb0.329 g/ coulomb 1.1182 mg/coulomb0.329 mg / coulomb

20➤ Which apparatus is used to check the charging condition of voltage in battery?

HydrometerHigh rate discharge testerMultimeterVoltmeter

21➤ What does the letter Z indicate in the formula M=Z/it

Mass deposited in grams Amount of current in AmpTime in seconds E.C.E of electrolyte

22➤ What happen to the terminal voltage of a cell if load increases?

Falls to zeroDecreasesRemains sameIncreases

23➤ How local action defect is prevented in voltaic cell?

By amalgamating the zinc plateBy connecting cells in parallelBy using a depolarizing agentBy connecting cells in series

24➤ What is the effect of buckling defect in a lead acid battery?

Reducing the strength of electrolyteIncreasing the internal resistance Bending of the electrodes Making short between the electrodes

25➤ Which instrument is used to measure the specific gravity of electrolyte in lead acid battery?

High rate discharge tester BarometerAnima meterHydrometer

26➤ What is the outcome of the chemical reaction that takes place in negative plate of lead acid battery during discharging?

Lead peroxide(PbO2)Lead sulphate(PbSO4)Sponge lead(Pb) Lead sulphate + water

27➤ What is the purpose of separator in lead acid battery?

To avoid short in between the positive and negative platesTo provide a path for electrolyte To keep positive and negative plate in a sequence array To hold the positive and negative plate firmly

28➤ Why the vent plug is kept open during charging of a battery? |

To check the level of electrolyteTo allow oxygen enter insideTo escape the gas freelyTo check the colour changes in the plates

29➤ What is the effect on output power with respect to temperature in solar cells?

Decreases with increase in temperature Decreases with decrease in temperatureIncreases with increase in temperatureNo effect on change in temperature

30➤ What is the function of fine selector switch in battery charger?

Selection of voltage rangeSelection of charging methodSelection of charging timeSelection of current rating

Your score is