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Current Electricity
A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is
600 Ω
1000 Ω
800 Ω
400 Ω
600 Ω
1000 Ω
800 Ω
400 Ω
Answer
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Related Question
Current Electricity
Nichrome wire is an alloy of
Nickel and chromium
Copper and silver
Chromium and vanadium
Lead and zinc
Nickel and chromium
Copper and silver
Chromium and vanadium
Lead and zinc
Answer
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Current Electricity
Semiconductors have _______temperature co-efficient of resistance.
Zero
None of the listed here
Negative
Positive
Zero
None of the listed here
Negative
Positive
Answer
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Current Electricity
If an electric current is passed through a nerve, the man
Becomes insensitive to pain
Begins to laugh
Begins to weep
Is excited
Becomes insensitive to pain
Begins to laugh
Begins to weep
Is excited
Answer
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Current Electricity
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as
25 : 4
2 : 5
5 : 2
4 : 25
25 : 4
2 : 5
5 : 2
4 : 25
Answer
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Current Electricity
Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct?
Both lamps will glow equally bright
40 W lamp will fuse
40 W lamp will glow brighter
100 W lamp will glow brighter
Both lamps will glow equally bright
40 W lamp will fuse
40 W lamp will glow brighter
100 W lamp will glow brighter
Answer
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