Plsss help I will mark brainlist

Metal improves conductivity since Metals usually have small amounts of valance electrons which allow smoother movement through them. Metalloids can either improve or weaken conductivity by adding or removing an electron. Non-metals have poor conductivity because their valance shell haves 4 or more valance electrons.

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I used

G/O/O/G/L/E

the 2nd one

Explanation:

Here, we are required to identify which of the statements is true.

The statement which is true is Choice B:

The force of friction between the block and surface will decrease.

Since, the force of friction is given by

F =μN

where μ is the coefficient of friction and N is the normal force.

The force of pull with which the student pulls the block is given as; Fp

which subtends an angle θ with the horizontal, the normal force on the block becomes

N = (Mg- Fpsinθ).

and consequently, the frictional force becomes

Fs = μ(Mg- Fpsinθ)

Therefore, upon increasing θ , sinθ increases which consequently decreases the normal force, N = (Mg - Fpsinθ) , which also means the frictional force decreases.

Evidently, choice B is true..

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