Q.1
The transfer of what type of atomic particle is responsible for the static charges on objects?
  • neutrons
  • protons
  • electrons
  • none of these
Q.2
Charged objects can be attracted to:
  • Neutral objects
  • Objects with the opposite charge
  • Both
Q.3
Which of the following does not change in an ordinary transformer........
  • .Frequency
  • .Voltage
  • .Current
  • Any of the above
Q.4
Mutual inductance between two magnetically coupled coils depends on
  • Permeability of the core material
  • Number of turns of the coils
  • Cross sectional area of their common core
  • All of the above
Q.5
If in an iron cored coil the iron core is removed so as to make the air cored coil, the inductance of the coil will be
  • More
  • Less
  • The same
  • None of these
Q.6
The center of an inductor, which is either made from insulating or conducting material is called the ____.
  • henry
  • dielectric
  • core
  • center
Q.7
Inductance value is also affected by permeability, , cross sectional area and____________.
  • impedance
  • the alternating current
  • the number of turns
  • impedance
Q.8
Capacitors are identified by which two values?
  • Farads and watts
  • Maxwells and current
  • Farads and voltage
  • Watts and henries
Q.9
What is the unit of measurement for capacitance?
  • Maxwells
  • Farads
  • Henries
  • Watts
Q.10
The ability of a capacitor to store a charge is called __________.
  • Resistance
  • Capacitance
  • Inductance
  • Dielectric constant
Q.11
Two common inductor cores are ___________.
  • air and iron
  • carbon and copper
  • plastic and Teflon
  • desiccant and lead
Q.12
Which of the following is NOT a dielectric material ?
  • air
  • ceramic
  • glass
  • copper
Q.13
If the capacitance of a capacitor is 47μF, and the voltage difference across the capacitor terminals is 6V, then the energy stored in that capacitor is:
  • 846×10-6Joule
  • 7.23×10-3 Joule
  • 6.76×10-5Joule
  • 5.94×10-2Joule
Q.14
How much energy is stored whenA flowsthrough aH inductor?
  • 500 J
  • 10000 J
  • 12500 J
  • 25000 J
  • 50000 J
Q.15
An inductor with an inductance of 5mH is connected in series with aohm resistor.What is the time constant of the inductor?
  • 2.5 x 10^-4 s
  • 4 x 10^4 s
  • 0.1s
  • 100s
Q.16
With respect to the capacitor, which relationship is true?
  • C = Q/V
  • V = C×Q
  • Q = C/V
  • Q = V/C
Q.17
What is the voltage across the plates of the capacitor if the capacitance ismicro Farads and the Charge stored ismicro Coulombs?
  • 0.333 V
  • 3 V
  • 300 V
  • 0.3 V
Q.18
Which of the following is the unit of inductance?
  • Ohm
  • Henry
  • Ampere turns
  • Webers/meter
Q.19
The electrical energy consumed by a coil is stored in the form of:
  • an electrical field
  • a force field
  • an electrostatic field
  • a magnetic field
Q.20
The voltage induced across an inductor as its magnetic field collapses is called ____.
  • Counter emf
  • Transition voltage
  • Reverse voltage
  • Counter voltage
0 h : 0 m : 1 s