Tag: chemical effects of electric current

Questions Related to chemical effects of electric current

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. 

Which of the following is a poor conductor of electricity?

physics chemical effects of electric current does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. Distilled water

  2. Tap water

  3. Sea water

  4. Drinking water

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Correct Option: A
Explanation:

Distilled water is free of salts and is a poor conductor.

What make(s) water conducting?

physics chemical effects of electric current does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. Salts

  2. Hydrogen

  3. Oxygen

  4. None of the above

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Correct Option: A
Explanation:

Salts makes water conducting.

Most liquids that conduct electricity are solutions of :

physics chemical effects of electric current does liquid conduct electricity? liquids conduct electricity do liquids conduct electricity?

  1. acids

  2. bases

  3. salts

  4. all of the above

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Correct Option: D
Explanation:

Most liquids that conduct electricity are solutions of acids, bases ,and salts (because the  solutions of acids, bases or salts are conducting in nature. They allow the current to pass through