Current electricity class 12 CBSE

The amount of charge flowing through a cross-sectional area of a wire per unit of time is called:

• Voltage

• Power

• Resistance

• Work

• Current

The algebraic sum of voltages around any closed path in a network is equal to ____________

• Infinity

• 1

• 0

• Negative Polarity

Thicker wires have _______ resistance than thinner wires.

• more
• less
• the same

Kirchhoff’s II law for the electric network is based on:

• Law of conservation of charge

• Law of conservation of energy

• Law of conservation of angular momentum

• Law of conservation of mass

We use alloy for making of resistors, because they have

• Temp. coefficient Resistivity

  (a) Low low

• High High

• High LOW

• Low High

The internal resistance of a cell is the resistance of

• Material used in the cell

• Electrolyte used in the cell

• Electrodes of the cell

• vessel of the cell

Kirchhoff's 1st law is based upon

• Conservation of charge

• Conservation of energy

• Conservation of mass

• Conservation of momentum

Mobility is

• Electric field per unit Drift velocity

• Drift velocity per unit electric field

• Electric potential per unit Drift velocity

• Drift velocity per unit Electric potential

Ohm's law obeyed by

• Ohmic conductors only

• Non ohmic conductors only

• All conductors

• None

The balanced Wheatstone bridge condition is

• R1/R3 = R2/R4

• R1/R4 = R3/R2

• R1/R2 = R4/R3

• R1/R2 = R3/R4