what is the electric potential at a distance of 9cm from 3nC?
what is the electric potential at a distance of 9cm from 3nC?
Options
(a) 270V (b) 3V (c) 300V (d) 30V
Correct Answer:
300V
Explanation:
Given, q = 3 nC = 3 × 10⁻⁹ […]
Electrostatics
An electric dipole of dipole moment p is placed in a uniform external electric field
An electric dipole of dipole moment p is placed in a uniform external electric field E. Then the,
Options
(a) torque experienced by the dipole is E x p (b) torque is zero, […]
Two equal and opposite charges of masses m₁ and m₂ are accelerated
Two equal and opposite charges of masses m₁ and m₂ are accelerated in a uniform electric field through the same distance. What is the ratio of their accelerations, if their ratio of masses is m₁/m₂=0.5? […]
Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
Options
(a) 2.3×10⁻⁸ N (b) 4.6×10⁻⁸ N (c) 1.5×10⁻⁸ N (d) None of these
Correct Answer:
2.3×10⁻⁸ […]
Consider two concentric spherical metal shells of radii r₁ and r₂( r₂>r₁). If the outer
Consider two concentric spherical metal shells of radii r₁ and r₂( r₂>r₁). If the outer shell has a charge q and the inner one is grounded, then the charge on the inner shell is
Two charges of equal magnitude q are placed in air at a distance 2a
Two charges of equal magnitude q are placed in air at a distance 2a apart and third charge -2q is placed at mid-point. The potential energy of the system is (where, ε₀=permitivity of free space) […]
Electric field at a point of distance r from a uniformly charged wire of infinite
Electric field at a point of distance r from a uniformly charged wire of infinite length having linear charge density λ is directly proportional to
Options
(a) r⁻¹ (b) r (c) r² (d) […]
Two concentric spheres kept in air have radii R and r.
Two concentric spheres kept in air have radii R and r. They have similar charge and equal surface charge density σ. The electrical potential at their common centre is (where,ε₀=permitivity of free space)
Options […]
If a charge on the body is 1nC, then how many electrons are present on the body?
If a charge on the body is 1nC, then how many electrons are present on the body?
Options
(a) 1.6×10¹⁹ (b) 6.25×10⁹ (c) 6.25×10²⁷ (d) 6.25×10²⁸
Correct Answer:
6.25×10⁹
Explanation:
No explanation available. […]
Two charged spheres seperated at a distance d exert a force F on each other.
Two charged spheres seperated at a distance d exert a force F on each other. If they are immersed in a liquid of dielectric constant K=2, then the force (if all conditions are same) is […]