- What is the SI unit of electric field strength?
A) Joules
B) Coulombs
C) Newtons
D) Volts/meter
Answer: D) Volts/meter
- What is the direction of the electric field created by a positive charge?
A) Away from the charge
B) Towards the charge
C) Horizontal to the charge
D) No direction
Answer: A) Away from the charge
- If a positive charge is placed in an electric field, which way will it move?
A) Away from the electric field
B) Towards the electric field
C) It won't move
D) It depends on the magnitude of the charge
Answer: B) Towards the electric field
- What is the electric field strength at a distance of 1 meter from a point charge of 2 coulombs?
A) 2 V/m
B) 4 V/m
C) 6 V/m
D) 8 V/m
Answer: C) 6 V/m
- Two point charges are placed 1 meter apart. If one charge is positive and the other is negative, what is the direction of the electric field between them?
A) Towards the positive charge
B) Towards the negative charge
C) In a circular pattern around both charges
D) No direction
Answer: A) Towards the positive charge
- What is the formula for electric field strength?
A) E = F/m
B) E = F/q
C) E = q/F
D) E = m/F
Answer: B) E = F/q
- What is the relationship between electric field strength and distance from a point charge?
A) Electric field strength increases with distance
B) Electric field strength decreases with distance
C) Electric field strength is independent of distance
D) Electric field strength varies randomly with distance
Answer: B) Electric field strength decreases with distance
- What is the electric field strength inside a charged conductor?
A) Zero
B) Infinite
C) Varies randomly
D) Same as the electric field strength outside the conductor
Answer: A) Zero
- What is the electric field strength at the surface of a charged conductor?
A) Zero
B) Infinite
C) Varies randomly
D) Same as the electric field strength inside the conductor
Answer: B) Infinite
- What is the relationship between electric potential and electric field?
A) Electric potential is the negative of electric field
B) Electric potential is the inverse of electric field
C) Electric potential is the gradient of electric field
D) Electric potential is the integral of electric field
Answer: D) Electric potential is the integral of electric field
- What is the unit of electric potential?
A) Joules
B) Coulombs
C) Newtons
D) Volts
Answer: D) Volts
- What is the relationship between electric potential and electric potential energy?
A) Electric potential is the negative of electric potential energy
B) Electric potential is the inverse of electric potential energy
C) Electric potential is the gradient of electric potential energy
D) Electric potential is the derivative of electric potential energy
Answer: C) Electric potential is the gradient of electric potential energy
- What is the difference between an electric field and an electric potential?
A) Electric field is a scalar quantity while electric potential is a vector quantity
B) Electric field is a vector quantity while electric potential is a scalar quantity
C) Electric field and electric potential are the same thing
D) Electric field and electric potential are independent of each other
Answer: B) Electric field is a vector quantity while electric potential is a scalar quantity
- What is the electric potential energy of a point charge in an electric field?
A) U = F/q
B) U = q/E
C) U = qV
D) U = EV
Answer: C) U = qV
- What is the formula for electric potential at a point in space?
A) V = F/m
B) V = F/q
C) V = U/q
D) V = Ed
Answer: D) V = Ed
- What is the relationship between electric potential and electric potential energy for a point charge in an electric field?
A) V = U/q
B) U = Vq
C) V = U/E
D) U = V/E
Answer: B) U = Vq
- What is the electric potential energy of two point charges placed a distance apart?
A) U = kq1q2/d
B) U = kq1q2/d^2
C) U = kq1q2d
D) U = kq1q2d^2
Answer: A) U = kq1q2/d
- What is the electric potential energy of a charged particle in a uniform electric field?
A) U = qE/d
B) U = qEd
C) U = qE^2/d
D)
Answer: B) U = qEd
- What is the work done in moving a charge from one point to another in an electric field?
A) W = qV
B) W = qE
C) W = qEd
D) W = qV/d
Answer: D) W = qV/d
- What is the formula for electric flux?
A) Φ = EA
B) Φ = E/A
C) Φ = A/E
D) Φ = E^2A
Answer: A) Φ = EA
- What is the unit of electric flux?
A) Coulombs
B) Newtons
C) Volts
D) Volts/meter
Answer: A) Coulombs
- What is Gauss's law?
A) The total flux through a closed surface equals the charge enclosed by the surface divided by the permittivity of free space
B) The total charge enclosed by a closed surface equals the flux through the surface divided by the permittivity of free space
C) The total electric field through a closed surface equals the charge enclosed by the surface divided by the permittivity of free space
D) The total permittivity through a closed surface equals the charge enclosed by the surface divided by the electric field of free space
Answer: A) The total flux through a closed surface equals the charge enclosed by the surface divided by the permittivity of free space
- What is the electric field inside a uniformly charged sphere?
A) Zero
B) Infinite
C) Varies randomly
D) Same as the electric field outside the sphere
Answer: D) Same as the electric field outside the sphere
- What is the electric field outside a uniformly charged sphere?
A) Zero
B) Infinite
C) Varies randomly
D) Same as the electric field inside the sphere
Answer: D) Same as the electric field inside the sphere
- What is the formula for the electric potential due to a uniformly charged sphere at a point outside the sphere?
A) V = kq/r
B) V = kq/R
C) V = kQ/r
D) V = kQ/R
Answer: D) V = kQ/R
- What is the formula for the electric potential due to a uniformly charged sphere at a point inside the sphere?
A) V = kq/r
B) V = kq/R
C) V = kQ/r
D) V = kQ/R
Answer: C) V = kQ/r
- What is the relationship between electric potential and electric field for a point charge?
A) Electric potential is proportional to the square of the electric field
B) Electric potential is inversely proportional to the electric field
C) Electric potential and electric field are independent of each other for a point charge
D) Electric potential is proportional to the electric field
Answer: D) Electric potential is proportional to the electric field
- What is the relationship between electric field and electric flux?
A) Electric field is the derivative of electric flux
B) Electric field is the gradient of electric flux
C) Electric field and electric flux are independent of each other
D) Electric field is proportional to electric flux
Answer: B) Electric field is the gradient of electric flux
- What is the electric field due to an infinite line of charge?
A) Zero
B) Infinite
C) Varies randomly
D) Proportional to the distance from the line of charge
Answer: D) Proportional to the distance from the line of charge
- What is the electric field due to an infinite plane of charge?
A) Zero
Answer: D) kq/2a^2
- What is the electric potential due to an infinite line of charge at a point a distance "r" away from the line?
A) kλ/r
B) kλ/r^2
C) kλ/r^3
D) kλln(r/a)
Answer: D) kλln(r/a)
- What is the electric field due to a charged disk at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) Proportional to the distance from the center of the disk
Answer: D) Proportional to the distance from the center of the disk
- What is the electric potential due to a charged disk at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) Proportional to the distance from the center of the disk
Answer: D) Proportional to the distance from the center of the disk
- What is the capacitance of a parallel-plate capacitor with plate area A and plate separation d?
A) C = ε0A/d
B) C = ε0d/A
C) C = Ad/ε0
D) C = ε0/Ad
Answer: A) C = ε0A/d
- What is the energy stored in a capacitor with capacitance C and charge Q?
A) U = Q^2/C
B) U = Q^2/2C
C) U = CV^2/2
D) U = QV/2
Answer: C) U = CV^2/2
- What is the electric potential energy of two point charges q1 and q2 separated by a distance r?
A) U = kq1q2/r
B) U = kq1q2/r^2
C) U = kq1q2/r^3
D) U = kq1q2ln(r/a)
Answer: A) U = kq1q2/r
- What is the electric potential at a point due to a dipole?
A) Zero
B) Infinite
C) Varies randomly
D) Proportional to 1/r^2
Answer: D) Proportional to 1/r^2
- What is the torque experienced by a dipole placed in a uniform electric field?
A) Zero
B) Proportional to the strength of the electric field
C) Proportional to the dipole moment
D) Proportional to the angle between the dipole moment and the electric field
Answer: D) Proportional to the angle between the dipole moment and the electric field
- What is the formula for the potential difference between two points in an electric field?
A) V = Ed
B) V = Fd
C) V = qE
D) V = W/q
Answer: A) V = Ed
- What is the formula for the electric field due to a charged ring at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) kQz/(z^2+a^2)^(3/2)
Answer: D) kQz/(z^2+a^2)^(3/2)
- What is the formula for the electric field due to a uniformly charged sphere at a point outside the sphere?
A) Zero
B) kQ/r^2
C) kQ/r
D) kQ/R^2
Answer: B) kQ/r^2
- What is the formula for the electric potential due to a uniformly charged sphere at a point outside the sphere?
A) Zero
B) kQ/r^2
C) kQ/r
D) kQ/R
Answer: C) kQ/r
- What is the formula for the electric field due to a charged cylinder at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) λ/2πε0r
Answer: D) λ/2πε0r
- What is the formula for the electric potential due to a charged cylinder at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) λ/2πε0ln(r/a)
Answer: D) λ/2πε0ln(r/a)
- What is the formula for the energy stored in an inductor with inductance L and current I?
A) U = LI^2/2
B) U = LI
C) U = I^2/2L
D) U = I^2L/2
Answer: A) U = LI^2/2
- What is the formula for the energy stored in a capacitor with capacitance C and potential difference V?
A) U = CV^2/2
B) U = CV
C) U = V^2/2C
D) U = QV/2
Answer: A) U = CV^2/2
- What is the formula for the magnetic field due to a long straight wire carrying current I at a distance r from the wire?
A) Zero
B) μ0I/2πr
C) μ0I/4πr
D) μ0I/8πr
Answer: B) μ0I/2πr
- What is the formula for the magnetic field due to a current loop at a point on its axis?
A) Zero
B) Infinite
C) Varies randomly
D) μ0IR^2/(2(R^2+z^2)^(3/2))
Answer: D) μ0IR^2/(2(R^2+z^2)^(3/2))