Ohm’s law is not applicable to____________?

Related Mcqs:

1. Ohm’s law is not applicable to__________?

   A. semi-conductors
   B. D. C. circuits
   C. small resistors
   D. high currents

2. The condition for the validity under Ohm’s law is that_______________?

   A. resistance must be uniform
   B. current should be proportional to the size of the resistance
   C. resistance must be wire wound type
   D. temperature at positive end should be more than the temperature at negative end

3. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?

   A. 0.4 ohm
   B. 0.6 ohm
   C. 0.8 ohm
   D. 1.0 ohm

4. International ohm is defined in terms of the resistance of________________?

   A. a column of mercury
   B. a cube of carbon
   C. a cube of copper
   D. the unit length of wire

5. 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

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

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

7. If/, R and t are the current, resistance and time respectively, then according to Joule’s law heat produced will be proportional to_______________?

   A. I2Rt
   B. I2Rf
   C. I2R2t
   D. I2R2t*

8. An instrument which detects electric current is known as_____________?

   A. voltmeter
   B. rheostat
   C. wattmeter
   D. galvanometer

9. In a lamp load when more than one lamp are switched on the total resistance of the load_____________?

   A. increases
   B. decreases
   C. remains same
   D. none of the above

10. Which method can be used for absolute measurement of resistances _______________?

    A. Lorentz method
    B. Releigh method
    C. Ohm’s law method
    D. Wheatstone bridge method

    Updated by: Inam