The rating of a fuse wire is always expressed in __________?
A. ampere-hours
B. ampere-volts
C. kWh
D. amperes
Category: Engineeeing Mcqs
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
The minimum charge on an ion is __________?
A. equal to the atomic number of the atom
B. equal to the charge of an electron
C. equal to the charge of the number of electrons in an atom (#) zero
D. equal to the charge of a proton
All of the following are equivalent to watt except __________?
A. (amperes) ohm
B. joules/seC.
C. amperes x volts
D. amperes/volt
Ohm’s law is not applicable to __________?
A. vacuum tubes
B. carbon resistors
C. high voltage circuits
D. circuits with low current densities
Which one of the following does not have negative temperature co-efficient?
A. Aluminum
B. Paper
C. Rubber
D. Mica
With rise in temperature the resistance of semi-conductors __________?
A. decreases
B. increases
C. first increases and then decreases
D. remains constant
Current velocity through a copper conductor is __________?
A. the same as propagation velocity of electric energy
B. independent of current strength
C. of the order of a few ^.s/m
D. nearly 3 x 108 m/s
With rise in temperature the resistance of pure metals __________?
A. increases
B. decreases
C. first increases and then decreases
D. remains constant
