Curioustab

Home » Electronics and Communication Engineering » Materials and Components

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

one-fourth
half
twice
four times

Correct Answer: four times

Explanation:

Current carrying capacity depends on area of cross-section.

← Previous Question Next Question→

More Questions from Materials and Components

As the temperature of a pure silicon specimen is increased
When a material becomes a superconductor, its resistivity becomes
In metals the thermal conductivity K and electrical conductivity σ are related as (K/σT) = L, L is known as
In metals, the average drift velocity of electron per unit field is called mobility.
Silicon and germanium atoms combine orderly into array of atoms located in repetitive geometric pattern. This pattern is called
Dielectric constant of transformer oil is about
In carbon resistor colour code, the third band is red. It indicates
Assertion (A): In many materials, dielectric polarization causes mechanical distortion. Reason (R): If dielectric polarization causes mechanical distortion then mechanical distortion must cause dielectric polarization.
Consider the following statement If an electric field is applied to an n type semiconductor bar, the electrons and holes move in opposite directions due to their opposite charges. The net currents is both due to electrons and holes with electrons as majority carriers sum of hole and electron currents difference between electron and hole currents. Which of above statements are correct?
Assertion (A): ∈r can be determined experimentally by measuring the capacitance of a parallel plate capacitor with and without the dielectric. Reason (R): Capacitance of a parallel plate capacitor = .

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion