Current Electricity MCQ Level - 1 - Physics MCQ

0.5V

2V

2.5V

3V

equal to the resistance of the load

very large as compared to the load resistance 

non-zero but less that the resistance of the load

zero

collision of conduction electron with atoms.

inter electron collisions 

inter atomic collision

fall of electron from higher energy orbits to lower energy orbits

current flow from the point to the earth

the potential of the point is the same as that of the earth.

current flows through the conductor only if one more point of the same circuit with some resistance between the two is connected to the ground 

when the current flows through the conductor to the earth the current through the circuit remains unchangaed

R/8

R/2

4R

R/4

halved

four times 

doubled

one-fourth

current, electric field and drift speed

current and drift speed 

drift speed only

current only

the resistance will be halved and the specific resistance will be doubled

the resistance will be doubled and the specific resistance will be halved 

the resistance and the specific resistance will both remain unchanged

the resistance will be halved and the specific resistance will remain unchanged

the electron drift speed is usually very large 

the very small magnitude of the electron charge has to be divided by the still smaller product of the number density and drift speed to get the electric current

the number density of free electron as well as the electron drift speed are very large and these compensate for the very small magnitude of the electron charge

the number density of free electron is very high and this can compensate for the low values of the electron drift speed and the very small magnitude of the electron charge

2E/N