## Physics MCQ on Dielectrics for NEET, JEE, Medical and Engineering Exam 2021

MCQ on Dielectrics: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Dielectrics, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

## MCQ on Dielectrics

Q1. Which of the following statements is true for a dielectric?
a) Dielectrics are superconductors at high temperature
b) Dielectrics are superconductors at low temperature
c) The cannot become superconductors
d) They have very less breakdown voltage

(b) Dielectrics are superconductors at low temperature

Q2. The dielectric constant cannot be _____.
a) Infinity
b) 5
c) 6
d) 7

(a) Infinity

Q3. Dielectric material are basically ________.
a) Insulator
b) Semiconductors
c) superconductors
d) Conductors

(a) Insulators

Q4. Which among the following is a dielectric?
a) Copper
b) Aluminium
c) Plastic
d) Ceramic

(d) Ceramic

Q5. When the air in a capacitor is replaced by a medium of dielectric constant K, the capacity ____.
a) Decrease K times
b) Increase K times
c) The  K2 times
d) Remains constant

(b) Increase K times

Q6. A  capacitor of capacity C=10μF is connected to a constant voltage battery of 12 V. Now space between plates is filled with a liquid of dielectric constant 5. The charge that flows now from the battery to the capacitor is _______.
a) 120 μC
b) 699 μC
c) 480 μC
d) 24 μC

(c) 480 μC

Q7. How can a dielectric be converted to a conductor?
a) Compression
b) Heating
c) Expanding
d) Freezing

(b) Heating

Q8. The capacitance of a parallel plate capacitor is C. If a dielectric slab of thickness equal to one-fourth of the plate separation and dielectric constant K is inserted between the plates, then the capacitance becomes ______.
a) KC/2(K+1)
b) 2KC/K+1
c) 5KC/4K+1
d) 4KC/3K+1

(d)4KC/3K+1

Q9. Dielectric material do not have _______.
a) Free electrons
b) Bound charge
c) Proton
d) neutron

(a) free electron

Q10. Find the dielectric constant for material with electric susceptibility of 5.
a) 4
b) 6
c) 7
d) 3

(b) 6