In a coaxial cable, braided copper is used for

More Questions from Materials and Components

• 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.
• Assertion (A): From the slope of the line in Figure, we can find permanent dipole moment of the molecules. Reason (R): Total polarization of a polyatomic gas is given by P = N(ae + ai + μ2p / 3kT)E.
• Assertion (A): Electronic and Ionic polarization in a polyatomic gas are independent of temperature. Reason (R): The orientation polarization is independent of temperature.
• In atomic physics, a state with l = 0 is called p state.
• Assertion (A): In a perfect capacitor, the current density is given by ω ∈0E0∈'rcos(ωt + 90°), where ∈r' is real part of dielectric constant. Reason (R): In a perfect capacitor, dielectric losses are zero.
• The attraction between the nucleus and valence electron of copper atom is
• The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm2/s respectively. The diffusion length of carriers is
• If a sample of germanium and a sample of silicon have the same impurity density and are kept at room temperature
• For a paramagnetic material, susceptiblity increases with increasing temperature.
• If a piece of wood is placed in a magnetic field

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