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Current Electri...

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  • Question 1
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    The expression of resistance of  temperature dependence in a metallic wire is

  • Question 2
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    When two resistors with resistances R1R_1 and R2R_2 are connected in series, then the total equivalent resistance is 

  • Question 3
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    Equivalent resistance is more than either of the two resistances when they are in:

  • Question 4
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    Directions For Questions

    A cell supplies a current of 1.2 A through two 2Ω2 \Omega  resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A .

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    The e.m.f. of the cell is

  • Question 5
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    The current II and voltage VV graphs for a given metallic wire at two different temperatures T1T_1 and T2T_2 are shown in the figure. It is concluded that :

  • Question 6
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    In a closed circuit the e.m.f. and internal resistance of the generator are EE and rr respectively. If the external resistance in the circuit is RR, then the Ohm's law has the form :

  • Question 7
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    A technician has 1010 resistors each of resistance 0.1 Ω0.1\ \Omega. The largest and smallest resistance that he can obtain by combining these resistors are:

  • Question 8
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    If the temperature is increased, what will be the effect on the resistance of a conductor?

  • Question 9
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    If in the experiment of Wheatstone's bridge, the positions of cells and galvanometer are interchanged, then balance point will

  • Question 10
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    A cell of e.m.f. ε\varepsilon and internal resistance rr sends current 1.0A1.0 A when it is connected to an external resistance 1.9Ω1.9\, \Omega. But it sends current 0.5A0.5 A when it is connected to an external resistance 3.9Ω3.9\, \Omega. Calculate the values of ε\varepsilon and rr.

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