Advertisements
Advertisements
Question
Define the following:
Potential difference
Advertisements
Solution
Potential difference: The potential difference between two points may be defined as the work done in moving a unit positive charge from one point to the other.
APPEARS IN
RELATED QUESTIONS
Define one coulomb charge.
What is the potential difference between the terminals of a battery if 250 joules of work is required to transfer 20 coulombs of charge from one terminal of battery to the other?
The device used for measuring potential difference is known as:
A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.
A current of 1.6 mA flows through a conductor. If charge on an electron is –1.6 × 10-19 coulomb, find the number of electrons that will pass each second through the cross section of that conductor.
A cell of e.m.f 2.0 V and internal resistance 1Ω is connected to the resistors of 3Ω and 6Ω in series. Calculate:
(i) the current drawn from the cell,
(ii) the p.d. across each resistor,
(iii) the terminal voltage of the cell and
(iv) the voltage drop.
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
Electric potential is a ____________.
Study the following circuit and find:
- Effective resistance of the circuit
- Current drawn from the battery
- Potential difference across the 5 omega resistor
Find the potential difference required to flow a current of 300 mA in a wire of resistance 20 Ω.
