ECE :: Materials and Components
-
Assertion (A): Ferroelectric materials have spontaneous polarization.
Reason (R): Above curie temperature, ∈ =
for ferro-electric materials. -
If e is the charge of an electron, R is the radius of its orbit and ω is the angular velocity of electron, the magnetic dipole moment μm of the orbit is |μm| = eωR2.
-
If ∈r' and ∈r" are the real and imaginary parts of complex dielectric constant ∈r, and δ is the loss angle. Then
-
Assertion (A): At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm2 of surface.
Reason (R): Thermionic emission current is given by Ith = SA0 T2 e-Ew/kT.
-
At room temperature, the current in intrinsic semiconductor is due to
-
Ferroelectric materials are those which
-
Assertion (A): Power loss in a conductor of resistance P = I2R.
Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m3/ second = JE.
-
Assertion (A): For Diamond, μr = 1
Reason (R): Diamond is a diamagnetic material.
Whatsapp
Facebook
.
