Q1. The relation between absolute permittivity of air (s0), absolute permeability of air (µ0) and velocity of light (c) is given by
A. µ0s0 = c^2
B. µ0s0 = c
C. 1/µ0s0 = c
D. 1/µ0s0 = c^2
Q2. The dielectric constant of most materials lies between
A. 1 and 10
B. 10 and 20
C. 20 and 50
D. 50 and 100
Q3. A test charge means a charge of
A. -1 C
B. 1 electron
C. +1 C
D. -20 C
Q4. Electric lines of force leave or enter the charge surface at an angle of
c. depending upon the angle of launch and entry
Q5. Electric field intensity is measured in
Q6. Electric field intensity is a .
Q7. Electric field intensity at a point due to a given charge if the relative permittivity of the medium decreases.
B. remains unchanged
D. becomes zero
Q8. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the plates, then electric field intensity will be
A. 20 N/C
B. 100 N/C
C. 4 N/C
D. 40 N/C
Q9. The electric flux density is a quantity.
Q10. The permittivity of a material is given by one of the following formulas.