Current Electricity
If a person’s skin is wet then the resistance becomes only 1000Ω resistance. How much current would he receive from the battery of 12 V?
2.3 × 10-2
1.2 × 10-2
2.9 × 10-2
3.6 × 10-2
1.2 × 10-2
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The value of resistance in insulators isA. small
B. large
C. zero
D. can not be determined
The resistance of a copper wire if it’s length is 1 m and its diameter is 2 mm is
A. 5.4 x 10-3 Ω
B. 5 Ω
C. 4 Ω
D. 2 Ω
The wire which carries no electricity is called
A. Earth/ground wire
B. livewire
C. neutral wire
D. delta wire
In a circuit 3 resistors 2Ω, 3Ω, 6Ω are connected (in parallel combination) across a battery of 6V, then the total current of the circuit should be
A. 12A
B. 3A
C. 6A
D. 2A
The specific resistance of iron is
A. 5.25 × 10-8
B. 1.69 × 10-8
C. 9.8 × 10-8
D. 2.75 × 10-8
The current which does not change its direction of flow is called
A. negative current
B. direct current
C. alternative current
D. fixed current
To pass the maximum current in the circuit, an ideal galvanometer should have
A. large resistance
B. very small resistance
C. no resistance
D. none of above
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