Iron used in bridges and automobiles are coated with
tin.
lead.
zinc.
Chromium.
Potential difference is measured in
Ohm
Coulomb
Ampere
Volt
The common dry cell produces a voltage of
60 V
1.5 V
3 V
30 V
In a cell, electrons move from:
Positive electrode to negative electrode.
Negative electrode to positive electrode.
Both A and B.
Electrones do not move and only negative charge moves from one place to another place.
Charge flows between two ends of a conductor when
Equal and same type of charges are present at the two ends
Different electric potentials exist at the two ends of a conductor
The potential difference between the ends is zero
Same electric potential is present at the two ends
The process of chemical decomposition of a solution on passing electric current through it is known as
Electroplating.
Electrolysis.
Hydrolysis.
Diffusion
Which of the following statements is correct?
A negatively charged particle has higher electric potential than a positively charged particle
Charge flow only through negative charge carriers like electrons
The randomly moving electrons in a metal wire will start moving in a particular direction when a potential difference is applied across it.
During electrolysis, charge flows through electrolyte solution via electrons
Physical reaction.
Chemical reaction.
No reaction.
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.
Metals are good conductors because
Outer electrons are loosely bound to the atom
Outer electrons are strongly bound to the atom
Inner electrons are loosely bound to the atom
Protons can detach from the nucleus and conduct electricity