What does an electric circuit mean? A continuous conducting path consisting of wires and other resistances and a switch between the two terminals of a cell or a battery along which an electric current flow is called a circuit.
Define the unit of current. The unit of current is Ampere. Calculate the number of electrons constituting one coulomb of charge. Name a device that helps to maintain a potential difference across a conductor.
A battery of many cells or a single cell can maintain potential difference. What is meant by saying that the potential difference between two points is 1 V? The potential difference between two points is said to be 1 V if 1 Joule of work is done in moving 1 Coulomb of charge from one point to another point.
How much energy is given to each coulomb of charge passing through a 6 V battery? On what factors do the resistance of a conductor depend? Resistance of a conductor depends on: a Length of a conductor.
Resistance of a conductor is directly proportional to the boat excursions galveston tx work of a conductor. If length increases resistance will also increase. The resistance of a conductor is inversely proportional to the area of the cross section of a conductor.
The resistance of a conductor also depends on the material of a conductor. The resistance of nichrome wire is 60 times more than that of copper wire as nichrome has high electrical resistance. The resistance of all pure metals increases on increasing the temperature and decreases on decreasing the temperature. Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source?
The current will flow more easily through a thick wire as compared to boat excursions galveston tx work thin wire because the resistance of thick wire is less than that of thin wire. Less resistance, means more current. Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of Us fanner value.
What change will occur in the current through it? Amount of current will be halved. Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal? The coils of such heating appliances are made up of an alloy rather than a pure metal because: a Boat excursions galveston tx work resistivity of an alloy is much higher than that of a pure metal.
What would be the readings in the ammeter and the voltmeter? What is the resistance of an electric iron connected to the same source that takes as much current as all the three appliances, and what is the current through it?
What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series? Advantages of parallel connection are: a In parallel circuit, if one electric appliance stop working due to some defect, then all other appliances keep working normally. Why does the cord of an electric heater no, glow while the heating element does?
The resistance of cord is extremely small as compared to that of heating element, so the heat produced in cord is less as compared to heating element.
So the heating element begins to glow but cord does not glow. Compute the heat generated while transferring coulomb of charge in one hour through a potential difference of 50 V. What determines the rate at which energy is delivered by a current? Electrical power determines the rate at which the energy is delivered by a current. An electric motor takes 5 A from a V line.
Determine the power of the motor and the energy consumed in 2h. A piece of wire of resistance R is cut into five equal parts.
Which of the following terms does not represent electrical power in a circuit? An electric bulb is rated V and W. Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be� a 1 : 2 b 2 : 1 c 1 : 4 d 4 : 1 Ans. How is a voltmeter connected in the circuit to measure the potential difference between two points?
It is connected in parallel. A copper wire, has diameter 0. How ncert solutions of electricity class 10th anniversary does the resistance change if the diameter is doubled? The values of current I flowing in a circuit with resistor for the corresponding values of potential difference V across the resistors are given below: I amperes 0.
Resistance of resistor R mean Q8. When a 12 V battery is connected across an unknown resistor, there is a current 2. Find the value of the resistance of the resistor. A battery of 9 V is connected in series with resistors of 0. Hence, four resistors of W are required to carry 5 A on a V line.
Several electric bulbs designed to be used on a V electric supply line, are rata 10 W. How many lamps can be connected in parallel to each other across he two win. What are the currents in the three cases? Two lamps, one rated W at V, and the other rated ncert solutions of electricity class 10th anniversary W at V, are ncert solutions of electricity class 10th anniversary in parallel to electric mains supply.
What current is drawn from the line if the ncert solutions of electricity class 10th anniversary voltage is V? Ncert solutions of electricity class 10th anniversary uses more energy, a W TV set in 1 hr, or a W toaster in 10 boat excursions galveston tx work Calculate the rate of which heat is developed in.
Explain the following: a Why the tungsten a used almost exclusively for the filament of electric lamps? This can cause a power surge, thus damaging the appliances. Toggle navigation. Resistance of a conductor depends on:.
The coils of such heating appliances are made up of an alloy rather than a pure metal because:. Hence, reading in the ammeter would be 0. Judge the equivalent resistance when Die following are connected in parallel�.
Total resistance in parallel. Advantages of parallel connection are:. Thus, highest resistance is 48 ohm. Thus, lowest resistance is 2 ohm. When it is operated on V, power consumed will be�. The ratio of heat produced in series and parallel combinations would be�. The resistance becomes one-fourth if the diameter is doubled.
The values of current I flowing in a circuit with resistor for the corresponding values of potential difference V across the resistors are given below:. I amperes 0. V volts 1. Plot a graph between V and I and calculate the resistance of that resistor. Resistance of resistor R mean.
If number of bulbs connected to current of 5 A is n. The relation between the resistance of a wire and its area of cross-section can be defined as:.
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