Technology of Cells and Batteries

What are electric cells?

• Devices that convert electrical energy into chemical energy

• Devices that convert chemical energy into electrical energy

• Devices that store mechanical energy

• Devices that convert thermal energy into electrical energy.

Alessandro Volta created the first electric cell by putting different metals in a ______.

• sugar solution

• salt water solution

• oil solution

• vinegar solution

What does a constant transfer of electrons produce?

• Alternating current

• Steady current

• Pulsating current

• No current

What is the role of the anode in a voltaic cell?

• It is the positive electrode where reduction occurs.

• It is the negative electrode where oxidation occurs.

• It is the positive electrode where oxidation occurs.

• It is the negative electrode where reduction occurs.

In a voltaic cell, electrons flow from the _______ to the cathode.

• cathode

• anode

• electrolyte

• salt bridge

What is transferred from the oxidized substance to the reduced substance in electric cells?

• Protons

• Neutrons

• Electrons

• Atoms

The substances called ______ are made of good conducting materials so electrons can flow.

• Electrolytes

• Insulators

• Electrodes

• Resistors

Which electrode is where oxidation occurs in an electrochemical cell?

• A) Cathode

• B) Anode

• C) Both

• D) Neither

The anode is labeled as _______ since it is the electrode where the electrons originate.

• Positive

• Neutral

• Negative

• None

Which of the following statements is true about anions in an electrochemical cell?

• Anions move to the cathode.

• Anions move to the anode.

• Anions remain stationary.

• Anions move to both electrodes.