Sources of Direct Current

What is the abbreviation for direct current?

vc

ac

de

dc (correct)

In which direction does current flow in a cell from its positive terminal to its negative terminal?

From positive to negative (correct)

It flows in a circular motion

It changes direction constantly

From negative to positive

What happens when a primary cell gets discharged?

It increases its current output

It stops giving current and becomes useless (correct)

It becomes rechargeable

It transforms into a secondary cell

What is the characteristic of a direct current flowing in one direction?

It has a constant magnitude Signup and view all the answers

What is the function of electrodes in a cell?

Conduct current into and out of the cell Signup and view all the answers

What distinguishes primary cells from secondary cells or accumulators?

Primary cells are discarded after use, while secondary cells can be recharged Signup and view all the answers

What is the main characteristic of direct current (d.c)?

Has a constant magnitude and flows in one direction Signup and view all the answers

In a primary cell, what type of reaction provides current?

Irreversible chemical reaction Signup and view all the answers

What happens to primary cells after the chemical energy has been converted into electrical energy?

They are discarded Signup and view all the answers

What is the purpose of the positive terminal in a cell?

To complete the circuit Signup and view all the answers

What is the role of electrodes in a cell?

Conduct electric current Signup and view all the answers

What happens to a cell when it gets discharged?

It stops giving current Signup and view all the answers

Why are primary cells considered 'use and throw' type of cells?

Because they are discarded after use Signup and view all the answers

Which direction does current flow in a cell?

Positive terminal to negative terminal Signup and view all the answers

What is the purpose of the zinc case in a dry cell?

To act as the positive terminal Signup and view all the answers

What kind of cells provide current through reversible chemical reactions?

Secondary cells or accumulators Signup and view all the answers