Tag: study about cells

Questions Related to study about cells

The two ends of a copper conductor of length 3.2 cm are connected to a battery acceleration of free electrons is

physics chemical effects of electric current study about cells electric cell types of cells

  1. $ 2 \times 10^{14} ms^{-2} $

  2. $ 3 \times 10^{14} ms^{-2} $

  3. $ 4 \times 10^{14} ms^{-2} $

  4. $ 5 \times 10^{14} ms^{-2} $

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Correct Option: A

A cell in which chemical energy is converted into electric energy by first passing a current through it is called a _________.

physics chemical effects of electric current study about cells electric cell types of cells

  1. Primary cell

  2. Secondary cell

  3. Photocell

  4. Electrostatic machine

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Correct Option: A
Explanation:

The cell in which chemical energy is converted into electrical energy is called a primary cell. Leclanche cell, Daniel cell, Voltaic cell are all primary cells and not the storage cells.

In torch light cell is used as source of which energy ?

physics chemical effects of electric current study about cells electric cell types of cells

  1. Electrical Energy

  2. Mechanical Energy

  3. Chemical Energy

  4. None of these

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Correct Option: A
Explanation:

In torch light, cell is used as a source of electrical energy.

As electrical cell internally converts stored chemical energy into electrical energy, allowing a current to flow from the positive terminal round to the negative one via an external circuit .

Which of the following is the purpose of an electrical cell?

physics chemical effects of electric current study about cells electric cell types of cells

  1. To change mechanical energy to electrical energy

  2. To change chemical energy to electrical energy

  3. To change electrical energy to mechanical energy

  4. To change electrical energy to chemical energy

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Correct Option: B
Explanation:

An electrical cell is an "electrical power supply" - internally it converts stored chemical energy into electrical potential energy, allowing a current to flow from the positive terminal round to the negative one via an external circuit (this is called conventional current, which is chosen to go from + to -).

State whether true or false :

Do not connect the two terminals of a cell with a single wire.

physics chemical effects of electric current study about cells electric cell types of cells

  1. True

  2. False

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Correct Option: A
Explanation:

We should not connect the two terminals of the cell with a wire without an appliance connected in a circuit. This is because by doing so, chemicals in the cell gets used up quickly and after sometime cell will stop working.

 What are the three basic parts of a cell?

physics chemical effects of electric current study about cells electric cell types of cells

  1. Electrodes, electrolyte, container

  2. Electrodes, acid, water

  3. Anode, cathode, ions

  4. Anode, load, depolarize

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Correct Option: A
Explanation:

A cell is basically a source of energy or electrical energy; there are three basic things required to make a cell work.

$i)$ The source of energy,(electrolyte)
$ii)$ The conduction medium to transfer energy (electrodes)
$iii)$ The contained to stare the energy. 

How many different colors of wire are needed to ignite the bulb when connected with cell ?

physics chemical effects of electric current study about cells electric cell types of cells

  1. 2

  2. 1

  3. 4

  4. 6

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Correct Option: A
Explanation:

There are two wires needed to connect and ignite the bulb when connected with cell.

$(i)$ To connect the terminal of the cell to the terminal of the bulb.
$(ii)$ The tungsten wire which will get lighten up.
Option $A$ is the correct answer. 

What is the $-$ve terminal of dry cell made up of?

physics electric current through conductors study about cells electric cell types of cells

  1. Carbon rod

  2. Zinc plate

  3. Magnesium plate

  4. Cadmium rod

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Correct Option: B
Explanation:
The dry cell consists of a zinc can, electrolyte paste, and a carbon rod in the center. A chemical reaction takes place between the zinc can and the paste. Electrons flow from the negative (zinc) terminal to the positive (carbon) terminal. Electrons are then pumped back to the negative terminal.

In secondary cells:

physics electric current through conductors study about cells electric cell types of cells

  1. Chemical changes can be reversed by heating electrodes

  2. Chemical changes can be reversed by passing electric current

  3. Current is produced by photo chemical reactions

  4. None of these

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Correct Option: B
Explanation:

Answer is B.

When a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity and is useless. In contrast, in a secondary cell, the reaction can be reversed by running a current into the cell with a battery charger to recharge it, regenerating the chemical reactants. 

Three types of electric cells which provide current are:

physics electric current through conductors study about cells electric cell types of cells

  1. Button cell, solar cell & secondary cell

  2. Solar cell, electrolytic cell, electro chemical cell

  3. $(A)$ and $(B)$ both are correct

  4. Neither $(A)$ nor $(B)$ is correct

Show answer
Correct Option: C
Explanation:

Answer is C.

When a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity and is useless. In contrast, in a secondary cell, the reaction can be reversed by running a current into the cell with a battery charger to recharge it, regenerating the chemical reactants. 
The types of cells mentioned in option A and option are correct.
Hence, option C is correct.