The electric field intensity at a point 2 m from an isolated point charge is 500 N/C. The electric potential at the point is
(A) 0 V
(B) 2.5 V
(C) 250 V
(D) 1000 V
1 Answers
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The force exerted by an electric field on a charge of +10 µC at a point is 16 × 10^-4 N. What is the intensity of the electric field at the point?
Given: q = 10 µC = 10 × 10-6 C, F = 16 × 10-4 N To find: Electric field intensity (E) Formula: E = \(\frac{F}{q}\) Calculation: From formula, E = \(\frac{16\times10^{-4}}{10\times10^{-6}}\) = 160 N/C
2 Answers 1 views
Find the work done when a point charge of 2.0 pc is moved from a point at a potential of -10 V to a point at which the potential is zero.
VA = -10V, VB = 0, q = 2 × 10-6 C To Find: Work done (W) Formula: VBA = \(\frac{W}{q}\) Calculation: From formula, W = VBA × q = (VB – VA) × q = (0 + 10) × 2 × 10-6 = 20 ×...
2 Answers 1 views
If a charge is moved against the Coulomb force of an electric field, (A) work is done by the electric field
(B) energy is used from some outside source
2 Answers 1 views
The dimensional formula of electric field intensity is
Correct option is: (B) [M1L1T-3A-1]
2 Answers 1 views
A force of 2.25 N acts on a charge of 15 × 10^-4 C. Calculate the intensity of electric field at that point.
Correct option is: (A) 1500 NC-1
2 Answers 1 views
A point charge q produces an electric field of magnitude 2 N C^-1 at a point distant 0.25 m from it. What is the value of charge?
Correct option is: (A) 1.39 × 10-11 C
2 Answers 1 views
The electric intensity in air at a point 20 cm from a point charge Q coulombs is 4.5 × 10^5 N/ C. The magnitude of Q is
Correct option is: (D) 2 µC
2 Answers 6 views
Electric lines of force about a positive point charge and negative point charge are respectively.
(B) radially outward, radially inward
2 Answers 1 views
In a uniform electric field, a charge of 3 C experiences a force of 3000 N. The potential difference between two points 1 cm
Correct option is: (A) 10 V
2 Answers 1 views
An electric dipole of moment p is placed in the position of stable equilibrium in a uniform electric field of intensity E.
Correct option is: (B) pE sinθ
2 Answers 2 views