NCERT Class 12 Chapter 3 Physics Electric Currents in Conductors MCQ Quiz - 1

1. The rate of flow of electric charge through any cross-section of a conductor is known as __________.

Electric field

Electric potential

Electric current

Electric field

2. Unit of conductance is __________

Siemen

Dyne

Volts

Ohm

3. Which of the following is non-ohmic resistance?

Diode

Carbon resistor

Lamp filament

Copper wire

4. The opposition offered by the electrolyte of the cell to the flow of current through itself is known as __________.

Non-resistance

External resistance

Internal resistance

None of these options

5. In the series combination of two or more than two resistances

neither current nor voltage through each re-sistance is same.

the current through each resistance is same.

the voltage through each resistance is same.

both current and voltage through each resis¬tance are same.

6. In parallel combination of n cells, we obtain

less current

more voltage

more current

less voltage

7. To maintain a steady current through the conductor, some external device must do work. What does the external device provide?

Potential difference

Inductance

Capacitance

Electromotive force

8. A charge is moving across a junction, then

at some places momenturii will be conserved and at some other places momentum will not be conserved

momentum will be conserved

momentum will not be conserved

none of these

9. The resistivity of alloy manganin is

Nearly independent of temperature

Decreases with increase in temperature

Increases rapidly with increase in temperature

Increases rapidly with decrease in temperature

10. Which of the following is the most conductive element?

Silver

Aluminium

Lead

Hydrogen

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