1.8 Electric Field
1. The unit of intensity of electric field is
1 point
Newton / Coulomb
volt / metre
voltmetre
NewtonCoulomb
2. The magnitude of electric field intensity E such that an electron placed in it would experience an electrical force equal to its weight is given by
1 point
mge
mg/e
e/mg
ge^2 / m^2
Clear selection
3. A charge particle is free to move in an electric field. It will travel
1 point
Always along a line of force
Along a line of force, if its initial velocity is zero
Along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force
None of the above
Clear selection
4. Two charges +5 µC and +10 µC are placed 20 cm apart. The net electric field at the midPoint between the two charges is
1 point
4.5 x 10^6 N/C towards +5 µC
4.5 x 10^6 N/C towards +10 µC
13.5 x 10^6 N/C towards +5 µC
13.5 x 10^6 N/C towards +10 µC
Clear selection
5. There is an electric field E in Xdirection. If the work done on moving a charge 0.2C through a distance of 2m along a line making an angle 60 degree with the Xaxis is 4 J, what is the value of E?
1 point
sqrt(3) N/C
4 N/C
5 N/C
20 N/C
Clear selection
6. Two point charges +8q and 2q are located at x=0 and x=L respectively. The location of a point on the xaxis at which the net electric field due to these two point charges is zero is
1 point
8L
4L
2L
L/4
Clear selection
7. An electron moving with the speed 5 x 10^6 m/s is shot parallel to the electric field of intensity 1x10^3 N/C. Field is responsible for the retardation of motion of electron. Evaluate the distance travelled by the electron before coming to rest for an instant
1 point
7 m
0.7 mm
7 cm
0.7 cm
Clear selection
8. If e/m for an electron is 1.76 x 10^11 C/kg, then acceleration of an electron in an electric field of magnitude 50 V/cm is
1 point
8.8 x 10^14 m/s^2
6.2 x 10^13 m/s^2
5.4 x 10^12 m/s^2
zero
Clear selection
9. Three identical point charges as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vector(s) can coincide in direction with the electric field at the midpoint M of the hypotenuse
1 point
1
2
3
4
10. Four charges are placed on corners of a square having side of 5 cm. The electric field intensity at centre will be
1 point
upwards
towards right
downwards
towards left
Clear selection
Submit
This content is neither created nor endorsed by Google.
Report Abuse

Terms of Service

Privacy Policy
Forms