Capacitance

1. Name the physical quantity whose SI unit is Coulomb/volt.

• Electric Field
• Charge
• Electric Potential
• capacitance

2. 12pF capacitor is connected to 50V battery , How Much electrostatics energy is stored in the capacitor

• 1.5x10-8J
• 1.5x10-9J
• 1.5x10-10J
• 1.5x10-11J
• Option 5

3. A parallel plate capacitor with air b/w plate has capacitance of 8pF , what will be the capacitance , if the distance between the plate is reduced by half and space between them is filled with substance of dielectric constant is 6

• 16pF
• 36pF
• 96pF
• 86pF

4. Two capacitors of capacitance 6μF , 12μF are connected in series with a battery , the voltage across the 6μF capacitor is 2V Compute the total battery voltage

• 1V
• 2V
• 3V
• 4V

5. Calculate the capacitance of a parallel plate capacitor, if the area of each plate is 1m2 and the distance of separation of the plates is 1mm

• 8.853x10-7F
• 8.853x10-9F
• 8.853x10-11F
• 8.853x10-14F

6. A 4µF is charged by a 200V supply. It is then disconnected from the supply , and is connected to another uncharged 2µF capacitor , how much electrostatics energy of the first capacitor is lost in the form of heat and electromagnetic radiation

• 167x10-2 J
• 36.7x10-2 J
• 7.67x10-2 J
• 2.67x10-2 J

7. An air capacitor is given a charge of 2µc raising its potential to 200 V. if on inserting a dielectric medium its potential falls to 50 V, what is the dielectric constant of the medium?

• 2
• 4
• 6
• 8

8. Net Capacitance of three identical capacitors in series is 1 µF. What will be their net capacitance if connected in parallel ? find the ratio of energy stored in the two configurations if they are both connected in same source

• 1/9
• 1/12
• 1/16
• 1/3

9. calculate the capacitance of a parallel plate air capacitor of plate area area 30m 2 , the plates being separated by dielectric 2mm thick and relative permittivity 6

• O.797 µF.
• 0.297 µF.
• 0.397 µF.
• 0.497 µF.

10. Find the capacitance of infinite ladder between X and Y

• 1 µF.
• 2 µF.
• 3 µF.
• 4 µF.