A. 200oC ; 2 mV
B. 400oC ; 2 mV
C. 100oC ; 1 mV
D. 200oC ; 1 mV
A cell in secondary circuit gives null deflection for 2.5 m length of potentiometer having 10 m length of wire If the length of the potentiometer wire is increased by 1 m without changing the cell in the primary, the position of the null point now is <br>
Resistances are connected in the two gaps of a meter bridge.The balance point is 20cm from the zero end.When a 15Ω resistor is connected in series with the smaller resistance then the null point shifts to 40cm.the smaller resistance is
If in a Wheatstone bridge the battery and Galvanometer are interchanged, the condition for balance
(A): bending of a conducting wire effects electrical resistance
(R): Resistance of a wire depends on resistivity of that material
S.I unit of electrical conductivity
Thomson coefficient of a conductor is 10μVK. The two ends of it are kept at 50<sup>0 </sup>C and 60<sup>0</sup> C respectively. Amount of heat absorbed by the conductor when a charge of 10 C flows through it, is:
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A 25 watt,220 volt bulb and a 100 watt,220 volt bulb are connected in series across 440 volt line