Advertisements
Advertisements
प्रश्न
A Radio Set Draws a Current of 0.36 a for 15 Minutes. Calculate the Amount of Electric Charge that Flows Through the Circuit.
Advertisements
उत्तर
Given:
Current, I = 0.36 A
Time, t = 15 minutes = `(15xx60)` s = 900 s
Using the formula, `I=Q/t:`
or `Q=Ixxt=0.36xx900=324C`
Thus, the amount of electric charge that flows through the circuit is 324 C.
APPEARS IN
संबंधित प्रश्न
What does an electric circuit mean?
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason?
Compare how an ammeter and a voltmeter are connected in a circuit.
A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What current flows from the battery?
How many electrons are flowing per second past a point in a circuit in which there is a current of 5 amp?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
(d) Which circuit would have less current in it?
Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
How can you change the brightness of the lamp?
If the current passing through a conductor is doubled, what will be the change in heat produced
Match the pairs.
| ‘A’ Group | ‘B’ Group |
| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
A wire is passed through a piece of cardboard as shown in fig .. An electric current flows vertically down the wire and then flows back up. The two sections of the write are observed to repel each other.
(a) Wi th the aid of a diagram, describe how you would plot the magnetic field lines on the card .

(b) Sketch the magnetic field patterns around both the sections of the wire. Use your sketch to explain why the two sections repel each other.
(c) The repulsive force between the two sections is small. What changes could be made to increase it?
Tick (✓) the correct choice among the following :
Which of the following changes would enable a millimeter to be used as a
direct current ammeter reading upto 1 A?
An electric kettle is rated 2.5 kW, 250 V. Find the cost of running the kettle for two hours at Rs. 5.40 per unit.
The number of electrons constituting a 1-coulomb charge is ______.
Match the items in column-I to the items in column-II:
| Column - I | Column - II |
| (i) electric current | (a) volt |
| (ii) potential difference | (b) ohm meter |
| (iii) specific resistance | (c) watt |
| (iv) Electrical power | (d) joule |
| (v) electrical energy | (e) ampere |
In electrolytes such as salt solutions, the charge carriers are:
The direction of Direct Current (DC) is characterized as:
