Question
Explain dielectric strength and dielectric breakdown.
✓
Answer
→"An insulating medium which retains its insulating property up to a maximum electric field is called the dielectric strength of the insulating medium."
OR
→"The minimum electric field which starts the ionization a given non-conducting medium is called its dielectric strength."
→ A dielectric medium loses its insulating property many times, due to applied electric field. This effect is called dielectric breakdown.
→ For air, dielectric strength is nearly $3 \times 10^6 V / m$. (or $3000 V / mm$ )
OR
→"The minimum electric field which starts the ionization a given non-conducting medium is called its dielectric strength."
→ A dielectric medium loses its insulating property many times, due to applied electric field. This effect is called dielectric breakdown.
→ For air, dielectric strength is nearly $3 \times 10^6 V / m$. (or $3000 V / mm$ )
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
When a train starts, the head of a standing passenger seems to be pushed backward. Analyse the situation from the ground frame. Does it really go backward? Coming back to the train frame, how do you explain the backward movement of the head on the basis of Newton's laws?
Find the height over the earth's surface at which the weight of a body becomes half of its value at the surface.
A free neutron beta-decays to a proton with a half-life of 14 minutes.
- What is the decay constant?
- Find the energy liberated in the process.
The susceptibility of magnesium at 300K is $1.2 \times 10^{-5}$. At what temperature will the susceptibility increase to $1.8 \times 10^{-5}?$
→The graph shown here shows the variation of total energy (E) stored in a capacitor against the value of the capacitance (C) itself. Which of the two: the charge on capacitor or the potential used to charge it, is kept constant for this graph?
Compare the direction of the magnetic field inside a solenoid with that of the field there if the solenoid is replaced by its equivalent combination of north pole and south pole.
- Identify the logic gates marked P and Q in the given logic circuit.
- Write down the output at X for the inputs A = 0, B = 0 and A = 1, B = 1.
A capacitor of capacitance C is given a charge Q. At t = 0, it is connected to an ideal battery of emf $\in$ through a resistance R. Find the charge on the capacitor at time t.
→Explain the lateral shift for a ray refracted from a glass slab with parallel sides.
The first overtone frequency of a closed organ pipe $\mathrm{P}_1$ is equal to the fundamental frequency of an open organ pipe $P_2$. If the length of the pipe $P_1$ is 30 cm , what will be the length of $P_2$ ?
→