Advertisements
Advertisements
प्रश्न
State three differences between the primary and secondary cells.
Advertisements
उत्तर
|
Primary Cell |
Secondary cell |
|
1. Chemical reaction is irreversible. 2. Only chemical energy is converted into electrical energy when current is drawn from it. 3. It cannot be recharged and its internal resistance is high. |
1. Chemical reaction is reversible. 2. It converts electrical energy into chemical energy when current is passed in it (i.e., during charging), while converts chemical energy into electrical energy when current is drawn from it (i.e., during discharging). 3. It can be recharged and its internal resistance is low. |
APPEARS IN
संबंधित प्रश्न
Explain the concept of electric potential difference in terms of work done in transferring the charge.
What do you understand by the term resistance?
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
Which sphere is at lower potential before electrical contact on the basis of convention?
How many electrons constitute one unit electric charge in SI system?
State two conditions necessary for a circuit, such that electric current flows through it.
State two characteristics of resistances in the series circuit.
The following figure shows a metal rod PQ mounted on an insulated stand. The cap of an uncharged electroscope touches one end Q of the metal rod. A negatively charged ebonite rod is brought near the other end P of the metal rod.
(a) What charge does the end P have?
(b) What charge does the end Q have?
(c) What charge does the cap of the electroscope have?
(d) What charge does the gold leaf have?
(e) Will the leaf diverge or collapse? Give reason.
(f) If the electroscope is now earthed, what charge does the metal rod have?
What do you mean by the potential difference? Write its SI unit.
