Which of the following statement is true?
A galvanometer with low resistance in series is an ammeter
A galvanometer with high resistance in series is an ammeter
A galvanometer with high resistance in parallel is a voltmeter
A galvanometer with low resistance in parallel is a voltmeter
A galvanometer with low resistance in series is an ammeter
The resistance of a few meters of wire conductor in closed electrical circuit is
practically zero
high
low
very high
practically zero
If a parallel circuit is opened in the main line the current
is zero in the highest resistive branch
is zero in all branches
increases in the branch of the lowest resistance
increases in each branch
is zero in all branches
If a wire conductor of 0.2 ohm resistance is doubled in length its resistance becomes
0.4 ohm
0.6 ohm
0.8 ohm
1.0 ohm
0.4 ohm
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open
all three bulbs will light
rest of the two bulbs will not light
there will be heavy current in the main line
the other two bulbs will light
the other two bulbs will light
The substances which have a large number of free electrons and offer a low resistance are called
insulators
inductors
conductors
semi-conductors
conductors
In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is
66 v
132 V
80 V
33 V
66 v
A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is
800 Q
600 Q
400 Q
1000 Q
800 Q
The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms what is the resistance of the other ?
64 Q
36 Q
18 Q
48 Q
36 Q
Electric current passing through the circuit produces
thermal effect
magnetic effect
luminous effect
chemical effect
thermal effect
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