Objective Question Papers
Chapter 3: Current Electricity
Que 1: What is the order of magnitude of the resistance of a dry human body?
Que 2: A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. What is the temperature coefficient of resistivity of silver?
Que 3: The rate of flow of electric charge through any cross-section of a conductor is known as __________.
Que 4: Which of the following is non-ohmic resistance?
Que 5:Unit of conductance is __________.
Que 6:Current density is a __________.
Que 7:The resistivity of certain metals or alloys drops to zero when they are cooled below a certain temperature, this phenomenon is known as __________.
Que 8: The opposition offered by the electrolyte of the cell to the flow of current through itself is known as __________.
Que 9:An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be
Que 10: In the series combination of two or more than two resistances
Que 11: In parallel combination of n cells, we obtain
Que 12: In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will
Que 13:When a metal conductor connected to left gap of a meter bridge is heated, the balancing point
Que 14:In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should
Que 15: A charge is moving across a junction, then
Que 16: The resistivity of alloy manganin is
Que 17: Electrostatic field is ______ inside a conductor
Que 18: The electrostatic potential on the perpendicular bisector due to an electric dipole is _____________.
Que 19: _________ is the process in which a region is made free from any electric field.
Que 20:For any charge configuration, the equipotential surface through a point is _____ to an electric field at that point.
