Advertisements
Advertisements
प्रश्न
What is meant by saying that the potential difference between two points is 1 V?
उत्तर १
If 1 J of work is required to move a charge of amount 1 C from one point to another, then it is said that the potential difference between the two points is 1 V.
उत्तर २
The potential difference between two points is said to be one volt if one joule of work is done in moving one coulomb of electric charge from one point to the other.
Thus:
1 volt = `(1 "joule")/(1 "coulomb")`
APPEARS IN
संबंधित प्रश्न
What is meant by saying that the electric potential at a point is 1 volt?
What do you understand by the term "electric potential"? (or potential) at a point? What is the unit of electric potential?
If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?
A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?
Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?
Explain the statement ‘the potential difference between two points is 1 volt’.
The V-I graph for a series combination and for a parallel combination of two resistors is shown in Fig – 8.38. Which of the two, A or B, represents the parallel combination? Give a reason for your answer.
Electric cells having 2V potential difference each have been connected in the form of a battery. What will be the total potential difference of the battery in both cases?
The voltage across a 3Ω resistance is 6 V. How large is the current? What is
the resistance of a filament lamp when a voltage of 3 V across it causes a
current of 0.5 A?
Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.
Suppose there are three resistors A, B, and C having resistances r1, r2, and r3 respectively. If R represents their equivalent resistance, establish the following relation R = r1 + r2 + r3 when joined in series.
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.
Two bulbs are marked 100 W, 220 V and 60 W, 110 V. Calculate the ratio of their resistances.
State Ohm’s law.
A cylindrical conductor of length l and uniform area of cross section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section
Name the instrument which is used to measure the potential difference.
Inside a hollow charged spherical conductor, the potential ______
Study the following circuit and find:
- Effective resistance of the circuit
- Current drawn from the battery
- Potential difference across the 5 omega resistor
