Ohms Law Quiz | Ohms Law Objective Type Questions and Answerss
Questions
21
For a fixed supply voltage the current flowing through a conductor will decrease when
Answer: length of the conductor is increased
22
A lamp of 100 W at 200 V is supplied current at 100 volts. It will be equivalent to the lamp of
Answer: 25 W
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23
When current flows through heater coil it glows but supply wiring does not glow because
Answer: resistance of heater coil is more than that supply wires
24
Two electric bulbs of 100 W, 200 V are put in series and the combination is supplied 100 V. The power consumption of each bulb will be
Answer: 100 / 16 W
25
Which of the following lamps will have least resistance at room temperature ?
Answer: 200 W, 220 V
27
100 resistors of 100 ohms each arc connected in parallel. Their equivalent resistances will be
Answer: 10,000 ohms
28
The ratio of the resistance of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be nearly
Answer: 4
29
The current carrying capacity of the fuse material depends on
Answer: all of the above
31
Consider a circuit with two unequal resistances in parallel, then
Answer: potential difference across each is same
32
In which of the following cases is Ohm’s law not applicable?
Answer: Insulators
33
A copper wire of length l and diameter d has potential difference V applied at its two ends. The drift velocity is V. If the diameter of wire is made d/4, then drift velocity becomes
Answer: 16V
36
In a current-voltage relationship graph of a linear resistor, the slope of the graph will indicate
Answer: conductance
37
How many different combinations may be obtained with three resistors, each having the resistance R ?
Answer: 4
