Engineering Board Exam Reviewer · Physics · medium

A parallel-plate capacitor in air has plates of area 0.01 m2 separated by 1 mm. What is its capacitance? ( 0 = 8.85 × 10-12 F/m)

  1. 0.000089 pF
  2. 885.0 pF
  3. 88.50 pF
  4. 8.850 pF

Answer

C. 88.50 pF

Solution

C = 0A/d = 8.85 × 10-12 (0.01)/0.001 = 8.850 × 10-11 F = 88.50 pF.

More Physics questions

  1. How much energy is stored in a 10 F capacitor charged to 12 V?
  2. What is the equivalent capacitance of 4 F and 6 F capacitors connected in series?
  3. A 1.5 kW air conditioner runs 4 hours a day for 30 days. At ₱11 per kWh, what is the monthly cost?
  4. A 1.5 kW electric heater is used for 2 hours. How much energy does it consume?
  5. A copper wire has a resistance of 10 at 20 °C. What is its resistance at 80 ° C? ( = 0.0039 /° C)
  6. A wire is stretched uniformly to twice its original length. Its resistance becomes:
  7. Three resistors of 4 , 4 and 2 are connected in parallel, and the combination is in series with a 3 resistor across a 12 V battery. What…
  8. Three resistors of 2 , 3 and 5 are connected in series across a 20 V source. What is the current?
  9. What is the equivalent resistance of 6 and 3 resistors connected in parallel?
  10. A 100 W bulb operates at 220 V. What current does it draw?

All Physics Reviewer questions