Which of the followings is/are active element?

Related Mcqs:

1. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will___________?

   A. decrease
   B. increase
   C. remain constant
   D. none of the above

2. A NAND gate is called a universal logic element because______________?

   A. it is used by everybody
   B. any logic function can be realized by NAND gates alone
   C. all the minization techniques are applicable for optimum NAND gate realization
   D. many digital computers use NAND gates

3. The voltage induced in an inductor is represented as,

   A. product of its inductance and current through it.
   B. ratio of its inductance to the current through it.
   C. ratio of the current through it to its inductance.
   D. product of its inductance and rate of change of current through it.

4. Instantaneous power in inductor is proportional to the

   A. product of the instantaneous current and rate of change of current.
   B. square of instantaneous current.
   C. square of the rate of change of current.
   D. Temperature of the inductor.

5. The unit of resistivity is

   A. Ω.
   B. Ω – metre.
   C. Ω / metre.
   D. Ω / m².

6. Which of the following are the passive elements?

   A. Resistor
   B. Bulb
   C. Both
   D. None of these.

7. Power dissipation in ideal inductor is

   A. Maximum
   B. Minimum
   C. Zero
   D. A finite value

8. Which quantity should be measured by the voltmeter ?

   A. Current
   B. Voltage
   C. Power
   D. Speed

9. Which quantity consists of a unit 1KWh ?

   A. Energy
   B. Time
   C. Power
   D. Charge

10. Which of the following has no units?

    A. Permeability
    B. Moment of a magnet
    C. Magnetic susceptibility
    D. Permittivity