Insulating materials have the function of___________?

Related Mcqs:

1. Insulating materials have the function of______________?

   A. preventing a short circuit between conducting wires
   B. preventing an open circuit between the voltage source and the load
   C. conducting very large currents
   D. storing very high currents

2. Out of the following which is an insulating material____________?

   A. Copper
   B. Gold
   C. Silver
   D. Paper

3. Temperature co-efficient of resistance is expressed in terms of___________?

   A. ohms/°C
   B. mhos/ohm°C
   C. ohms/ohm°C
   D. mhos/°C

4. Which of the following materials has a negative temperature co-efficient of resistance?

   A. Copper
   B. Aluminum
   C. Carbon
   D. Brass

5. are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators______________?

   A. Varistors
   B. Thermistor
   C. Semi-conductors
   D. Variable resistors

6. 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.

7. The substances which have a large number of free electrons and offer a low resistance are called____?

   A. insulators
   B. inductors
   C. semi-conductors
   D. conductors

8. Which of the following statement is true both for a series and a parallel D. C. circuit?

   A. Elements have individual currents
   B. Currents are additive
   C. Voltages are additive
   D. Power are additive

9. If a parallel circuit is opened in the main line, the current_______________?

   A. increases in the branch of the lowest resistance
   B. increases in each branch
   C. is zero in all branches
   D. is zero in the highest resistive branch

10. An open resistor, when checked with an ohm-meter reads_____________?

    A. zero
    B. infinite
    C. high but within tolerance
    D. low but not zero