Materials which allow electric current to pass through them are called
Conductors.
Insulators.
Semiconductors.
None of these.
A cell converts
Electrical energy into chemical energy.
Chemical energy into electrical energy.
Magnetic energy into electrical energy.
Electrical energy into mechanical energy.
Switch is used to
Open an electric circuit
Increase electric voltage in a circuit
Decrease the voltage in the circuit
Open and close an electric circuit
Which of the following is the process by which particles made of base metals are coated with a thin layer of copper, silver, gold, etc by electrolysis ?
Electrolysis
Galvanization.
Electroplating.
Diffusion
Physical reaction.
Chemical reaction.
No reaction.
Copper electrode
Donates electrons to hydrogen ions
Accepts electrons from hydrogen ions
Donate electrons to sulphate ions
Accepts electrons from sulphate ions
Dilute sulphuric acid splits into
Oxygen ions, hydrogen ions and sulphur ions.
Hydrogen ions, oxygen ion and sulphate ions.
Hydrogen ions and sulphate ions.
Oxygen ions and hydrogen ions.
When an electron moves from negative electrode to positive electrode:
Negative charge moves from negative electrode to positive electrode.
Positive charge moves from positive electrode to negative electrode .
No charge flows from either electrode to other electrode.
Both A and B.
Current is the flow of
Matter.
Electrodes.
Protons.
Charge.
Charge can flow one place to another
Only through electrons.
Only through protons.
Through electorns, protons and ions.
Only through negative charge carriers.
