1) A capacitor holds 0.06 C of charge when fully charged by a 9V battery. The capacitance of the capacitor is a. 6.67 × 10-³ b. 5 × 10-³ c. 3.58 × 10-³ d. 2.68 × 10-³
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2) In the combination of parallel capacitors, the left plate of each capacitor is connected to the battery's a. no terminal b. both negative and positive terminals c. negative terminal d. positive terminal
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3) A glass rod rubbed with silk thread is a. positively charged b. negatively charged c. not charged d. dual charged
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4) If q₁ and q₂ are the magnitudes of two charges, r is the distance between the two charges, k is the constant of proportionality then coulomb's force F between the two charges is equal to a. k(q₁q₂)/r&sub2; b. k(q₁q₂)/r c. k(q₁q₂) + r&sub2; d. k(q₁q₂) + r
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5) The basic property of material body due to which it attracts or repels another object is called a. induction b. repulsion c. capacity d. charge
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6) If W is the work done in moving a positive charge q from infinity to a certain point in the field, the electric potential V at this point would be equal to a. V = W/q b. V = q/W c. V = W×q d. V = W + q
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7) Electric potential is a a. unmeasurable quantity b. vector quantity c. scalar quantity d. none of above
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8) The unit for electric field intensity is a. N b. NC-¹ c. Ns d. n
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9) To protect the leaves from the external electrical disturbance, we use a. chords b. capacitors c. mercury foil d. aluminum foil
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10) To prevent lightning from damaging tall buildings, we use a. lightning conductors b. lightning capacitors c. lightning insulators d. lightning gases
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11) 3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in series combination with a battery of 5V, as 1µF = 10-6F, the voltage across each capacitor is a. 1.96V, 1.63V, 1.4V b. 2.1V, 2.5V, 2.8V c. 0.5V, 0.9V, 0.8V d. 3.6V, 3.8V, 3.9V
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12) The property of attraction or repulsion between substances is due to the a. electric charges b. neutrons c. atoms d. capacitors
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13) The medium between the two plates is air or a sheet of some insulator, such a medium is called a. capacitor b. plug c. dielectric d. adopter
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14) 3 capacitors with capacitances 5µ F, 6µ F and 7µ F are arranged in parallel combination with a battery of 5V, as 1µ F = 10-6F, the quantity of charge on each plate of the capacitor is a. 25µC, 30µC, 35µC b. 15µC, 20µC, 25µC c. 5µC, 10µC, 15µC d. 45µC, 50µC, 55µC
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15) Due to a large quantity of electric charge which builds up in the heavy thunderclouds, the phenomenon occurs is called a. rain b. storm c. heating d. lightning
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16) The superior type of capacitor and used in vast ranges of application is a. ceramic capacitors b. fixed capacitors c. parallel plate capacitors d. electrolytic capacitors
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17) A negative electric charge a. attracts other negative charge b. repels other negative charge c. attracts a neutral charge d. repels a neutral charge
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18) What would be the energy supplied by the charge if a point charge of +2 is transferred from a point at potential 100V to a point at potential 50V? a. 50 J b. 100 J c. 200 J d. 250 J
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19) The force between two bodies having charges 500μC and 100μC separated by a distance of 0.5m in the air is a. 1800 N b. 1000 N c. 2200 N d. 300 N
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20) The amount of work done in bringing a unit positive charge from infinity to the point in an electric field is termed as a. electric field industry b. electric field c. electric potential d. electric field intensity
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21) If 0.8 N is the force of repulsion between two identical charges and the charges are 0.1 m apart. The value of each charge will be a. 8.4 × 10-⁷ b. 6.4 × 10-⁷ c. 9.4 × 10-⁷ d. 7.4 × 10-⁷
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22) SI unit of electric intensity is a. C-¹ b. N-¹ c. NC-¹ d. NC-⁴
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23) The capacitor capacitance can be increased or decreased by a. turning the rotatable plates in or out b. sliding the plates c. changing the plates d. changing the nature of plates
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24) If the voltage across the capacitor is 15V, the potential difference between its plates is a. 7.5V b. 15V c. 25V d. 10V
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