Current Electricity Test

Result

Current Electricity Test - 11

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Resistance of a conductor is

A
ratio of current to voltage

B
product of voltage and current

C
ratio of voltage to current

D
product of voltage and conductivity

Solution

According to Ohm’s law, V = IR. Therefore R = V/I
Question 2
1 / -0

Electromotive force is

A
The work done per unit charge by the source in taking the charge from lower to higher potential energy

B
The work done by the source in taking the charge from lower to higher potential energy

C
The number of charges pumped by the source from lower to higher potential energy

D
The work done per unit charge by the source in taking the charge from higher to lower potential energy

Solution

An electric field exists in the electrolyte between the positive and negative terminals of the battery. In the external circuit, the current flows from the positive electrode to the negative electrode. To maintain continuity, in the electrolyte, the current (positive charges) flow from the negative electrode (lower potential) to the positive electrode (higher potential). Work done by the source in taking unit positive charge from lower to higher potential is called electromotive force.
Question 3
1 / -0

Current density of a conductor is

A
the net charge flowing through the area

B
Is always zero

C
the net current flowing through the area normally per unit time

D
the net charge flowing through the area per unit time

Solution

Current density J = I/A
In electromagnetism, current density is the electric current per unit area of cross section. It is a vector and has a direction along the area vector.
Question 4
1 / -0

Mobility is defined as

A
the magnitude of the drift velocity per unit voltage

B
the magnitude of the drift velocity per unit electric field

C
the magnitude of the drift velocity per unit charge

D
the number of charges in motion per unit electric field

Solution

Mobility is defined as the drift velocity acquired by the charge per unit electric field strength. Faster the particle moves in a given electric field, strength greater is the mobility.
μ = v_d/ E