Class 10th Science Electricity | MCQ Test A

✏️Electricity MCQ Test A📝

1. In a metal, the path of motion of a free electron is

A) straight line B) random C) circular D) parabolic

2. A current of 1A is drawn by filament of an electric bulb. Number of electrons passing through the cross section of the filament in 16 seconds would be roughly [NCERT Exemplar]

A) 10²⁰ B) 10¹⁶ C) 10¹⁸ D) 10²³

3. A constant current is passed through a uniform conductor. At any given segment of the conductor there is

A) a net negative charge B) a net positive charge C) no net charge of any kind D) no net charge of any kind (d) a net charge proportional to the volume of segment

4. If 5 coulombs of charge flows through a conductor in 2 seconds, then the number of electrons flowing through a conductor in one second approximately is [NTSE]

A) 30×10¹⁸ B) 15.6×10¹⁸ C) 6×10¹⁸ D) 12×10¹⁸

5. That potential at a point is 20 V. The work done in bringing a charge of 0.5 C from infinity to this point will be

A) 20 J B) 10 J C) 5 J D) 40 J

6. The work done in moving an unit charge across two points in an electric circuit is a measure of

A) current B) potential difference C) resistance D) power

7. No current flows between two charged identical bodies if they have same

A) area of cross section B) potential C) charge D) Both (b) and (c)

8. The expressions that relate (i) Q, I and t and (ii) Q, V and W respectively are (Here the symbols have their usual meanings)

A) (i) I = Q/t (ii) W = V/Q B) (i) Q = It (ii) W = VQ C) (i) Q = I/t (ii) V = W/Q D) (i) I = Q/t (ii) Q = V/W

9. If the area of cross-section of resistance wire is halved, then its resistance becomes

A) one-half B) one-fourth C) 2 times D) 4 times

10. Electrical resistivity of a given metallic wire depends upon

A) nature of the material B) its shape C) its thickness D) its length