Whether circuit may be AC. or D. C. one, following is most effective in reducing the magnitude of the current?

A. Reactor
B. Capacitor
C. Inductor
D. Resistor

It becomes more difficult to remove_________________?

A. any electron from the orbit
B. first electron from the orbit
C. second electron from the orbit
D. third electron from the orbit

When one leg of parallel circuit is opened out the total current will______________?

A. reduce
B. increase
C. decrease
D. become zero

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

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

In the case of direct current____________?

A. magnitude and direction of current remains constant
B. magnitude and direction of current changes with time
C. magnitude of current changes with time
D. magnitude of current remains constant

When electric current passes through a bucket full of water, lot of bubbling is observeD. This suggests that the type of supply is____________?

A. A. C.
B. D. C.
C. any of above two
D. none of the above

Bulbs in street lighting are all connected in_____________?

A. parallel
B. series
C. series-parallel
D. end-to-end

For testing appliances, the wattage of test lamp should be_____________?

A. very low
B. low
C. high
D. any value

Switching of a lamp in house produces noise in the radio. This is because switching operation produces________?

A. arcs across separating contacts
B. mechanical noise of high intensity
C. both mechanical noise and arc between contacts
D. none of the above