coulomb's law

1. The Relation between coulomb and stat coulomb

• 1C=3x10 stat coulomb
• 1C=3x 1011stat coulomb
• 1C=3x 10 9 stat coulomb
• 1C=3x10 ab coulomb

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2.The Branch of Physics where we study about the charges at rest

• Electrostatics
• Electrodynamics
• Optics
• Magnetism

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NGSS.HS-PS2-4

3. The dimensional formula of electric charge is

• [MO LO TI AI]
• [MO LO T-I AI]
• [MO LO TI A-I]
• [MO LO T-I A-I]

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NGSS.HS-PS3-5

4. The minimum value of charge is

• coulomb
• 1.6×10-19 coulomb
• 1statcoulomb
• 3.2×10-19 coulomb

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NGSS.HS-PS2-4

5. Number of electrons forming 2 coulomb of charge is

• 6.25
• 1.25×1019
• 6.25×1018
• 6.25×10-19

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NGSS.HS-PS2-4

6. The force between two charges in air is 200N , Calculate the force if the distance between them is increased by 50%

• 44.44N
• 24.44N
• 30N
• 88.88N

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NGSS.HS-PS2-4

7. Consider three charges q1, q2 and q3 each equal to q at the vertices of an equilateral triangle of side L what is the force on a charge Q placed at the centroid of the triangle

• 6
• 6.2 5
• zero
• none of these

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NGSS.HS-PS2-4

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8. Two Concentric metallic spherical shells of radius R and 4R are given charges Q1 and Q2 respectively , The surface charge densities on the outer surfaces of the shells are equal , Determine the ration of Q1 :Q2

• 1/15
• 1/8
• 1/10
• 1/6

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NGSS.HS-PS2-4

9.Three Charges +2µC , +3µC and +4µC are Placed at the Corners of the Equilateral triangle ABC each of side 0.2m Find The force on +4µC due to two other Charges

• 3.93N
• 5N
• 10N
• 6N

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NGSS.HS-PS2-4

NGSS.HS-PS3-5

10. The Electrostatic Force between two equally negatively charged ions is 2.25x10-11 N When these are separated by distance of 96angstrom , How Many electrons are added in each ion

• 5
• 6
• 3
• 4

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NGSS.HS-PS2-4