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
Related Mcqs:
- Ohm’s law is not applicable to____________?
A. vacuum tubes
B. carbon resistors
C. high voltage circuits
D. circuits with low current densities - Ohm’s law is not applicable to__________?
A. semi-conductors
B. D. C. circuits
C. small resistors
D. high currents - 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 - 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 - 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 - An open resistor, when checked with an ohm-meter reads_____________?
A. zero
B. infinite
C. high but within tolerance
D. low but not zero - 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* - A resistance having rating 10 ohms, 10 W is likely to be a__________?
A. metallic resistor
B. carbon resistor
C. wire wound resistor
D. variable resistor - A closed switch has a resistance of_____________?
A. zero
B. about 50 ohms
C. about 500 ohms
D. infinity - With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
A. 10 W
B. 20 W
C. 40 W
D. 60 W
