Current Electricity questions
395 published questions with worked solutions.
- The equivalent resistance of series combination of two resistors is 's' When they are connected in parallel, the equivalent...
- Two wires of same length and thickness having specific resistances 6 cm and 3 cm respectively are connected in parallel. The...
- A current of 5 A is passing through a non-linear magnesium wire of cross-section 0.04 m^2. At every point the direction of...
- In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5 . However,...
- A cylindrical wire of radius 0.5 mm and conductivity 5 10^7 S/m is subjected to an electric field of 10 mV/m. The expected value...
- A current through a wire depends on time as i = _0t + t^2 where _0 = 20 A/s and = 8 As^ -2 . Find the charge crossed through a...
- When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between two of...
- A 5-A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is :
- In Bohr's atomic model, the electoron is assumed to revolve in a circular orbit of radius 0.5 Å. If the speed of electron is 2.2...
- Five identical cells each of internal resistance 1 and emf 5V are connected in series and in parallel with an external resistance...
- First, a set of n equal resistors of 10 each are connected in series to a battery of emf 20V and internal resistance 10 . A...
- A square shaped wire with resistance of each side 3 is bent to form a complete circle. The resistance between two diametrically...
- An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put in series...
- If you are provided a set of resistances 2 , 4 , 6 and 8 . Connect these resistances so as to obtain an equivalent resistance of...
- An electric bulb 500 watt at 100 volt is used in a circuit having 200 V supply. Calculate the resistance R to be connected in...
- What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an equivalent...
- In an electrical circuit, a battery is connected to pass 20 C of charge through it in a certain given time. The potential...
- What will be the most suitable combination of three resistors A = 2 , B = 4 , C = 6 so that (22/3) is equivalent resistance of...
- Eight copper wire of length and diameter d are joined in parallel to form a single composite conductor of resistance R. If a...
- The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance...
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