(a) I 2R It helped me a lot for my exams. It is helpful. Necessary condition for validity of Ohm’s law is that physical condition such as Accordingly, more change in temperature is observed in the nichrome wire. Answer. (c) 50 W Suppose 20 Joules of work is done in 4 seconds, Rate at which electric energy is consumed in a electrical circuit, 1 watt is power generated by Electrical Device when. Putting I = / For example charges developed by glass rod are rubbed with silk. V/R=V/R1 +V/R2 More is the length of wire, more is the number of collisions and more is the resistance. Now if we join both the metallic wire using a conducting metallic wire then charge will flow from metallic ball at higher potential to the one at lower potential. When two or more resistances are connected end to end then they are said to be connected in series combination. Electric circuit is a continuous and closed path of electric current. In series arrangement, when one component fails, the circuit is broken and none of the components works. Q= i.e. Derive expression to calculate equivalent resistance when different resistances are connected in series : Hence, tungsten is mainly used as heating element of electric bulbs. (c) Ohm’s law : When the physical conditions such as temperature etc. function checkTime(i) { I understand easily sir and I always make my notes by this website so thanks a lot. could you prepared shortly (iii)We are aware of the fact that “For a series combination of resistors the current is same in every part of the circuit or same current flows through each resistor”. The charge possessed by proton is called positive charge () while the charge possessed by electron is called negative charge (). Electric charges are made up of positive charges (protons) and negative charges (electrons). That’s why all devices like fan, TV, refrigerator, bulbs are connected in parallel. 2. (a) Potential difference across 6Ω = 12 V On signing up you are confirming that you have read and agree to Like in the given figure, the wire conducts electricity but the plastic insulation is an insulator. watt seconds, 1 Kilowatt hour = 3.6 × 10 Calculate the rate at which heat is developed in the heater. Diameter = 0.5 mm = 0.0005 m Notes are relly really awsome...it have very easy language....thanks for these notes... Sir why your videos are paid???? So, amount of charge flowing the filament of electric lamp Due to high resistance the coil becomes red color forms. Again note down the current (I. Unplug the key. A diagram which indicates how different components in a circuit have to be connected by using symbols for different electric components is called a circuit diagram. unit. 10.Define 1 volt. Suppose, if an electric heater consumes 1000W at 220V. The instrument that is used to measure its magnitude is called Voltmeter. And further, coulomb was the one who gave more information about the charges.

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