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Question 2 :
An electricity bulb of 100 watt is connected to supply of electricity of 220V. Resistance of filament is
Question 5 :
We have n resistors each of resistance R. The ratio of the combination for maximum and minimum values is
Question 6 :
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery,used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. Thepotentiometer wire itself is 4 m long. When the resistance, R, connected acrose the given cell, has valuesof<br>(i) infinity (ii) $9.5\Omega$<br>The 'balancing lengths, on the potentiometer wire are found to be 3m and 2.85 m, respectively.The value of internal resistance of the cell is
Question 7 :
What is the expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference ?<br>
Question 8 :
For which of the following dependence of drift velocity $v_d$ on electric field E, is Ohm's law obeyed?
Question 9 :
In a circuit two or more cells of the same e.m.f. are connected in parallel in order to
Question 11 :
A platform resistance thermometer reads 0 C when its resistance is $80\Omega$ and 100C when its resistance is $90\Omega$. Find the temperature at the platinum scale at which the resistance is $86\Omega$
Question 12 :
When a potential difference is applied across the ends of a linear-metallic conductor:<br>