Two plates of a parallel plate capacitor are 8.85 mm apart and 2.00 m² in area. Compute the capacitance of the parallel plate capacitor. (Take ɛ_o = 8.85 x 10^-12 F/m).
Answer: 2 x 10-9 F

Question FBQ27 :

What is the charge on a parallel plate capacitor with capacitance of 3.54 µF when a potential difference of 10,000 V is applied across it?
Answer: 0.0354 C

Question FBQ28 : ___________ is the SI unit of capacitance?
Answer: Farad

Question FBQ29 : Magnetic fields are due to____ charges in motion.
Answer: Electric

Question FBQ30 : A non-polar molecule acquires a ____ moment only in the presence of an electric field.
Answer: Dipole

Question FBQ31 : What happens to the capacitance of a parallel plate capacitor if we increase the distance of separation between the parallel plates of a capacitor by two?
Answer: The capacitance reduces by a factor of 2

Question FBQ32 : The introduction of a dielectric material between the plates of a parallel plate capacitor _________ the capacitance?
Answer: increases

Question FBQ33 : Materials which respond very strongly to the presence of magnetic fields are called___ materials
Answer: Ferromagnetic

Question FBQ34 : In ___ molecules the centres of positive and negative charges are located at different points.
Answer: polar

Question FBQ35 : The value of the magnetic flux B when the magnetic intensity H is zero is called ____
Answer: Remanence

Question MCQ1 : The capacitance of a parallel plate capacitor depends on____.
Answer: All the options 

Question MCQ2 : The magnetic dipole moment per unit volume is called_____.
Answer: Magnetisation

Question MCQ3 : In a dielectric material, the extent of the charge separation depends on the magnitude of the ___.
Answer: Local field

Question MCQ4 : The presence of dielectric led to the modification of _____law.
Answer: Gauss'

Question MCQ5 : Two capacitors connected in parallel have_____.
Answer: Equal potential difference

Question MCQ6 : Inside a dielectric, the average electric field is _____than the electric field causing polarisation.
Answer: Less

Question MCQ7 : The magnitude of the force F between two charges q₁ and q₂ kept at a distance r in a dielectric medium of permittivity ɛ is given by:
Answer: |F| = q₁q₂/4πɛr²

Question MCQ8 : A parallel plate capacitor has a capacitance of 1.0 F and the plates are 1.0 mm apart. What is the area of the plates? (Take ɛ_o = 8.85 x 10^-12 F/m)
Answer: 1.13 x 10⁸ m²

Question MCQ9 : Two plates of a parallel plate capacitor are 8.85 mm apart and 2.00 m² in area. Compute the capacitance of the parallel plate capacitor. (Take ɛ_o = 8.85 x 10^-12 F/m).
Answer: 2 x 10^-9 F

Question MCQ10 : Materials which respond very strongly to the presence of magnetic fields are called___.
Answer: Ferromagnetic

Question MCQ11 : The line integral of E around any closed path equals the rate of change of the magnetic flux φ through the surface enclosed by the path is --------------------law
Answer: Faraday's

Question MCQ12 : What is the effective capacitance of a parallel arrangement of 4 µF and 4 µF capacitors?
Answer: 2 µF

Question MCQ13 : Two point charges q₁ =10nC and q₂ = -60nC are separated by a distance r = 6cm. What is the magnitude of the electric force that q₁ exerts on q₂?
Answer: 1.5 x 10^-5N

Question MCQ14 : Conducting materials contain _____ which are free to move about.
Answer: Electrons

Question MCQ15 : The dipole moment per unit volume is called_____.
Answer: Polarisation

Question MCQ16 : The energy stored in a capacitor of capacitance 10 μF is 5 J. What is the voltage applied across its terminals.
Answer: 1,000 V

Question MCQ17 :

What is the dipole moment of a dipole comprising two charges q₁ = +8.0nC and q₂ = -8.0nC with 100 mm separation?
Answer: 8.0 x 10^-10 Cm

Question MCQ18 : How much charge is in a 1F capacitor which has a potential difference of 110V?
Answer: 110 C

Question MCQ19 :

Three capacitors of equal capacitance C are connected in series. What is the effective capacitance of the circuit?
Answer: C/3

Question MCQ20 : Magnetic field intensity H is measured in _____.
Answer: Amperes per metre

Question MCQ21 :

If an atom loses an electron, it becomes which of the following?
Answer: A cation

Question MCQ22 :

If an atom gains an electron, it becomes which of the following?
Answer: An anion

Question MCQ23 :

The plates of a parallel plate capacitor are separated by a distance. If a dielectric slab is inserted between the plates, the energy stored is ______?
Answer: Decreased

Question MCQ24 : The unit for the energy stored per unit volume in a dielectric medium is ________?
Answer: J/m3

Question MCQ25 : Which type of capacitor is used in low loss precision circuit where miniaturisation is important?
Answer: Ceramic

Question MCQ26 : Which of these is true of paramagnetic materials?
Answer: They get displaced in the direction of increasing field.

Question MCQ27 : Which of these is true of diamagnetic materials?
Answer: They get attracted in the direction of the decreasing field.

Question MCQ28 : The ratio of the magnetic moment and the angular momentum is called ______?
Answer: Gyro-magnetic ratio

Question MCQ29 : Diamagnetism involves a change in the ______ of the magnetic moment of an atom.
Answer: Magnitude

Question MCQ30 : In paramagnetic and diamagnetic materials the magnetisation is maintained by the_____.
Answer: Field

Question MCQ31 : The maximum safe voltage for a capacitor is called the_____voltage.
Answer: Working

Question MCQ32 : Calculate the energy stored in the magnetic field of a 3H inductor which carries a current of 2A.
Answer: 6J

Question MCQ33 : The work done per unit charge is called its _____.
Answer: Potential

Question MCQ34 : Magnetic fields are due to____ charges in motion.
Answer: Electric

Question MCQ35 : Free currents in a magnetized material are caused by________
Answer: External current sources