trial saat

When you rub rubber with wool …….. will transfer from the wool to the rubber

• Electrons

• Protons

• Neutrons

• Nuclei

A material that does not allow charges to move through it easily is

• Conductor

• Semiconductor

• electrolyte

• Insulator

A device used to detect electric charges

• Voltammeter

• Ammeter

• Electrical transformer

• Electroscope

If the distance between two charges is doubled, then the electrostatic force between them will.

• Decrease by four times

• does not change

• Decrease by half

• double

The unit of measurement of charges in SI Unit system is.

• Volt

• Ampere

• Coulomb

• Ohm

Two positive charges, one with 2×10-6C and the other with 8×10-6, are separated by 0.3 m. Knowing that

Coulomb’s constant is 9×109 N.m2/C2, the forces between the charges is equal to.

• 0.8 N

• 1.6 N

• 3.2 N

• 4.8 N

The following figure represents the Electric field of………….Charge

• Negative

• positive

• Neutral

An electric field affect a positive charge, 5×10-6C, by a force with magnitude 2×10-4 N. The magnitude of the

electric field at the charge location is equal to

• 40 N/C

• 50 N/C

• 60 N/C

• 80 N/C

The electric field between two wide parallel charged is 6000 N/C and the distance between them is 0.05 m.

The potential difference between them is

• 300 V

• 600 V

• 1200 V

• 1400 V

A capacitor with capacitance of 20 μF and potential difference between its plates equal to 45 has a charge

equals to

• 9×10-4 C

• 9.9×10-3 C

• 9.9×10-2 C

• 990C