1. If three 10 µF capacitors are connected in parallel, the net capacitance is
2. The charge of a parallel plate capacitor is doubled by increasing the voltage. Which one of the following statements is true concerning the capacitance of this parallel plate capacitor?
- The capacitance is decreased to one half of its original value.
- The capacitance is increased to twice its original value.
- The capacitance is increased to twice its original value.
- The capacitance depends on the electric field between the plates.
- The capacitance depends on the potential difference across the plates.
3. A parallel plate capacitor is charged and dismantled from the battery. If a material of dielectric constant K=3 is inserted between the plates, which one of the following can be observed?
- Voltage on the capacitor is multiplied by 3.
- Voltage on the capacitor is divided by 3.
- Charge on the plates is multiplied by 3.
- Charge on the plates is divided by 3.
- Voltage on the capacitor will not change.
4. If a 6 µF capacitor is charged to 200V, the charge in the capacitor will be?
5. A dielectric material must be:
- Resistor
- Insulator
- Good conductor
- Semiconductor
- Copper
6. If the insulator is inserted between the plates of a capacitor, the capacitance will
- Increase
- Decrease
- Remain the same
- Become zero
- None of the above
7. Kirchhoff's voltage law is concerned with:
- IR drops
- battery e.m.fs
- junction voltages
- first and second
- none of the above
8. Kirchhoff's current law is applicable to only
- Closed loops in network
- electronic circuits
- junction in a network
- electric circuits
- none of the above
9. At 20 °C a copper wire has a resistance of 4×10^(-3) Ω and a temperature coefficient of resistivity of 3.9×10^(-3) (C°)^(-1), its resistance at 100 °C is