Materials and Components - Section 1 (5)

In atomic physics, a state with l = 0 is called p state.

Assertion (A): In imperfect capacitors, the current does not lead the applied ac voltage by 90°.

Reason (R): When subjected to ac fields, the dielectric constant can be expressed as ∈'r - j∈"r.

A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must be

Material which lack permanent magnetic dipoles are known as

Assertion (A): Silicon is less sensitive to changes in temperature than germanium.

Reason (R): Cut in voltage in silicon is less than that in germanium.

The law J = σE, where J is current density, σ is electrical conductivity and E is field strength is

If the diameter of a wire is doubled, its current carrying capacity becomes

The number of valence electrons in pentavalent impurity is