True/False If a charged rubber rod is brought near first then away from the pith

Question

True/False
If a charged rubber rod is brought near first then away from the pith ball without touching the ball with anything, the pith ball acquires a net charge.

If an electroscope is charged then grounded by touching it, the leaves will always come closer.

If the amount of charge on each of the two point charges is doubled and the distance between them is also doubled then the couloumb force between them is uncharged.

The potential inside a conductor with electrostatic equilibrium, and on the oter surface of the conductor must equal zero.

If the conductor is placed in an external electric field and the charge inside the cavity is removed the net electric field inside the cavity is the same as the external electric field.

If a hydrogen atom, one elctron and one protron is trapped at the center of the cavity and the conductor is placed inside a box, the net electric flux through the surface of the boxs must be zero.

If the seperation between plates are tripled and the area of each plate is also tripled the capacitance increases by a factor of 9.

If a dielectric substance is inserted between the plates of of a charged capacitor then the electric field between the plates increases as the capacitor is fully charged.

The net avaerage speed of electrons decreases as the pass through a resistor circuit.

Adding more resistors to a cicuit must increase resistance in circuit.

If a metal rod of length L and radius R is elongated by a factor of 2, its resitivity increases by a factor of 2.

The electrical energy dissipated in a resistor increases as the current through it increases.

Despite the increase in resistance in a light bulb with temperature, the current through the light bulb obeys ohm's law.

Explanation / Answer

(a) TRUE

(b) FALSE

(c) TRUE

(d) TRUE

(e) TRUE

(f) TRUE

(g) FALSE

(h) FALSE

(i) TRUE

(j) FALSE

(k) FALSE

(l) TRUE

(m) FALSE

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