CELL AND BATTERY

Which device converts sunlight into electrical energy? Photovoltaic cell Liquid crystal diode Light emitting diode Light dependent resistor

Which law secondary cell works? Lenz's law Joule's law Faradays laws of electrolysis Faraday's laws of electromagnetic induction

What is the formula to calculate the Mass deposited during electrolysis? M= it gm M= zit gm M= it/zgm M= z/it gm

How the capacity of batteries is specified? Volt Watt Volt Ampere Ampere hour

What is the name of defect that bending of plates in secondary cells? Buckling Local action Partial short Hard sulphation

What is the unit of electric charge? Volt Watt Ampere Coulomb

What is the output voltage of lithium cell? 1.2 V 1.5 V 1.8 V 2.5 V

What is the method of charging if the battery is to be charged for short duration at higher rate? Initial charge Boost charge Trickle charge Freshening charge

Which electrolyte used in carbon zinc dry cells? Dilute sulphuric acid Ammonium chloride Potassium hydroxide Concentrated hydrochloric acid

Which effect causes by passing electric current in liquids? Heating Lighting Magnetic Chemical

Which material is used to make negative plates in lead acid battery? Lead dioxide Sponge lead Lead peroxide Lead sulphate

Which technique is used to control the corrosion of a metal surface? Anodic protection Cathodic protection Electrolytic protection Electrostatic protection

Which cell is most often used in digital watches? Voltaic Lithium Mercury Silver oxide

What is the effect if one cell is connected with reverse polarity in a parallel combination circuit? Voltage become zero Become open circuit Will get short circuited No effect will function normally

What is the function of fine selector switch in battery charger? Selection of current rating Selection of charging time Selection of voltage range Selection of charging method

What is the effect on output power with respect to temperature in solar cells? No effect on change in temperature Increases with increase in temperature Decreases with increase in temperature Decreases with decrease in temperature

What purpose the hydrometer is used during charging of battery? Determine the AH capacity Assess the battery voltage level Assess the discharge level of battery Determine the specific gravity of electrolyte

What is the formula for Faraday's first law of electrolysis? M=Z/it M = Zit M = it/ z M = Zt/i

Which is used as an electrolyte in lead acid battery? Hydrochloric acid Ammonium chloride Potassium hydroxide Diluted sulphuric acid

What is the outcome at the positive plate, after the chemical reaction in lead acid battery during charging? Sponge lead (Pb) Lead peroxide (Pbo2) Lead sulphate (Pbso4) Lead sulphate + water

Why the vent plug is kept open during charging of a battery? To escape the gas freely To allow oxygen enter inside To check the level of electrolyte To check the colour changes in the plates

In which method the battery is charged at low current for long period? Rectifier method Trickle charging method Constant current method Constant potential method

How the hard sulfation defect in lead acid battery can be rectified? Changing with new electrolyte Replacing with new electrodes Recharging the battery for a longer period at low current Recharging the battery for short period at high current

Which material is used as cathode (-ve) electrode in silver oxide battery? Zinc Copper Carbon Silver oxide

What is the Electro Chemical Equivalent (ECE) of silver? 0.001182 mg/coulomb 0.01182 mg/coulomb 0.1182 mg/coulomb 1.1182 mg/coulomb

What is the outcome of the chemical reaction that takes place in negative plate of lead acid battery during discharging? Sponge lead (Pb) Lead peroxide (Pbo2) Lead sulphate(Pbso4) Lead sulphate + water

What is the purpose of separator in lead acid battery? To provide a path for electrolyte faced To hold the positive and negative plate firmly To avoid short in between the positive and negative plates To keep positive and negative plate in a sequence array

Which instrument is used to measure the specific gravity of electrolyte in lead acid battery? Barometer Hydrometer Anima meter High rate discharge tester

What is the effect of buckling defect in a lead acid battery? Bending of the electrodes Reducing the strength of electrolyte Making short between the electrodes Increasing the internal resistance