# XII_Physics_Current Electricity_9 Online Test

SI unit of specific resistance is ____.
ohm m
ohm m-1
ohm m2
(ohm)-1
A suitable unit for expressing electric field strength is ____.
V/C
C/m2
Am
N/C
Effective resistance of a circuit containing resistances in parallel is ____.
equal to the sum of the individual resistances
smaller than any of the individual resistances
greater than any of the individual resistances
sometimes greater and sometimes smaller than the individual resistances
An air filled parallel-plate capacitor has a capacitance of 10-12 fared. Separation of the plates is doubled and wax inserted between them, which makes the capacitance 2 x 10-12 fared. This implies that the dielectric constant of the wax is
2.0
3.13
4.0
8.00
Force between the two parallel wires carrying current has been used to define ____.
ampere
coulomb
volt
watt
1 kWh is equal to ____.
3.6 x 106 MJ
3.6 x 105 MJ
3.6 x 10-13 MJ
3.6 x 1013 MJ
I Me V is equal to ____.
1.6 x 10-19J
1.6 x 10-14J
1.6 x 10-13J
1.6 x 1013J
Electric potential at the surface of an atomic nucleus (z =50) of radius 9x10-13 cm is ____.
80 volts
8 x 106 volts
9 volts
9 x 105 volts
Commonly used safety fuse wire is made of ____.
copper
nickel
an alloy of tin and lead
If a unit charge is taken from one point to another over an equipotential surface, then ____.
work is done on the charge
work is done by the charge
work done on the charge is constant
no work is done
Description:

This test consist of 10 questions.Students should ideally take 10 minutes to complete the test. This test is useful for those students who are preparing for IIT JEE, AIEEE or any other engineering entrance test. This test consist of questions from Current Electricity and which, in general, is focused in AIEEE and IIT JEE. In this chapter, Cells, emf and internal resistance are key topic and mostly application based questions are asked.

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