Advertisements
Advertisements
प्रश्न
Exercise.
Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5 A.
Advertisements
उत्तर
Given: Time ‘t’ = 2 hours = 2 × 60 × 60s
t = 7200s
I = 2.5A
Amount of charge, Q = I × t
= 2.5 × 7200
Q = 18000C
APPEARS IN
संबंधित प्रश्न
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below:
| I (amperes) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volts) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Plot a graph between V and I and calculate the resistance of that resistor.
A battery of emf 12 V and internal resistance 2 Ω is connected with two resistors A and B of resistance 4 Ω and 6 Ω respectively joined in series.
Find:
1) Current in the circuit
2) The terminal voltage of the cell
3) The potential difference across 6Ω Resistor
4) Electrical energy spent per minute in the 4Ω resistor.
How much energy is transferred by a 12 V Power supply to each coulomb of charge which it moves around a circuit?
Name a device which helps to maintain potential difference across a conductor (say, a bulb).
What is Ohm's law? Explain how it is used to define the unit of resistance.
What is the ratio of potential difference and current known as?
Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.
A current of 0.2 A flows through a conducting wire for 5 minutes. How much charge will flow?
Which of the following represents voltage?
Electric potential is a measure of the ______ on the unit positive charge to bring it to that point against all electrical forces.
