Question

An amount of 100 joule of work is done in transferring a charge of 5c from one terminal of a battery to the other. Find the voltage of the battery.

Answer 1

the required answer is 20 volt

GIVEN:

• work done,w = 100J

• charge,q= 5C

TO FIND:

the voltage of battery,v

FORMULA:

$v= \frac{w}{q}$

KEYS:

• v..... voltage of battery
• w...... work done
• q..... charge transferred

SOLUTION:

$v = \frac{w}{q} \\ \\ v = \frac{100}{5} \\ \\ v = 20 \: volt$

ANSWER:

voltage of battery is 20 volt

FACTS RELATED TO QUESTION:

• voltage of battery is the measure of its POTENTIAL DIFFERENCE.

• potential difference across the battery is defined as the amount of work done in transferring a charge from one point to another

• unit of potential difference is volt.

FORMULA RELATED TO VOLTAGE:

• V= IR , according to ohms law, where I is current and R is resistance

• power , p=V^2/R

• V=w/q