Basic Electrical Mcqs

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

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 resistance of a few meters of wire conductor in closed electrical circuit is____________?

A. practically zero
B. low
C. high
D. very high

Which of the following statement is true________________?

A. A galvanometer with low resistance in parallel is a voltmeter
B. A galvanometer with high resistance in parallel is a voltmeter
C. A galvanometer with low resistance in series is an ammeter
D. A galvanometer with high resistance in series is an ammeter

A. 2 watts
B. 4 watts
C. 6 watts
D. 12 watts

The filament of an electric bulb is made of______________?

A. carbon
B. aluminium
C. tungsten
D. nickel

In a series circuit with unequal resistances______________?

A. the highest resistance has the most of the current through it
B. the lowest resistance has the highest voltage drop
C. the lowest resistance has the highest current
D. the highest resistance has the highest voltage drop

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

The rating of a fuse wire is always expressed in________________?

A. ampere-hours
B. ampere-volts
C. kWh
D. amperes

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