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Document (17) 1

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dev9117singh
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Physics Test / Chapter: Current electricity/Test

1. A network of resistors is connected to a 16 V battery with internal resistance of 1Ω as shown


in the following figure. Compute the equivalent resistance and potential difference across

AB, BC and CD.


2. Two cells of E.M.F. 10 V and 2 V and internal resistances 10 Ω And 5 Ω respectively, are

connected in parallel as shown. Find The effective voltage across R.


3. Explain the term ‘drift velocity’ of electrons in a conductor. Hence Obtain the expression for
the current through a conductor in terms Of drift velocity.

6. I-V graph for two identical conductors of different materials A and B is shown in the figure.
Which one of the two has higher Resistivity?

7. A silver wire has a resistance 2.4Ω at 27.5 C and resistance 2.7Ω at 100 C. Determine
temperature coefficient of the resistance Of silver.

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