All good conductors have high____________?

Related Mcqs:

1. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________?

   A. 160 ohms
   B. 80 ohms
   C. 20 ohms
   D. 10 ohms

2. Internal resistance of ideal voltage source is ?

   A. zero
   B. infinite
   C. finite
   D. 100 ohms

3. A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?

   A. 400 Q
   B. 600 Q
   C. 800 Q
   D. 1000 Q

4. All of the following are equivalent to watt except_____________?

   A. (amperes) ohm
   B. joules/seC.
   C. amperes x volts
   D. amperes/volt

5. Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across______________?

   A. Rl
   B. Ri
   C. either Rl or Ri
   D. none of them

6. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________

   A. decrease
   B. increase
   C. remain same
   D. heater will burn out

7. Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?

   A. 100 W lamp will glow brighter
   B. 40 W lamp will glow brighter
   C. Both lamps will glow equally bright
   D. 40 W lamp will fuse

8. Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ___________?

   A. 3/2 Q
   B. 6 Q
   C. 4 Q
   D. 8/3 Q

9. The number of electrons in the outer most orbit of carbon atom is___________?

   A. 3
   B. 4
   C. 6
   D. 7

10. When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?

    A. 1 n-mho
    B. 106 mho
    C. 1 milli-mho
    D. none of the above