Tag: study about cells

Questions Related to study about cells

What is the direction of flow of current inside a dry cell?

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

  1. from $+$ve to $-$ve terminal

  2. from $-$ve to $+$ve terminal

  3. from $+$ve to $+$ve terminal

  4. from $-$ve to $-$ve terminal

Show answer
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.

The cartridge in a dry cell contains :

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

  1. manganese dioxide and ammonium chloride

  2. manganese dioxide and zinc dust

  3. ammonium chloride and zinc dust

  4. manganese dioxide and activated carbon

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Correct Option: D
Explanation:

The cartridge in a dry cell contains manganese dioxide and activated carbon .

State whether true or false.
In a dry cell, the zinc container acts as the positive electrode.

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

  1. True

  2. False

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Correct Option: B
Explanation:

In a dry cell, the zinc container acts as positive electrodes.T his statement is false.

The longer lead of a LED is always connected to the negative terminal of the battery and the shorter lead is connected to the posltlve terminal of the battery

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

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: B
Explanation:

Answer is B.
The LED bulb has two leads. The lead connected to the positive terminal of battery is called anode and the lead connected to the negative terminal is cathode. The slightly longer lead than the other is always connected to the positive terminal and the shorter lead is connected to the negative terminal.
Hence, the given statement is false.