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Free Online Mock Physics Multiple Choice Test on Electricity effects
Sub Category : Electricity effects Test : 2 Time Left :
1) The heat generated through2 ome and 8 ome resistances separately when a condenser of 200 Micro signF capacity, changed to 200 V, is discharged one by one will be(1) 4 J and 16 J respectively (2) 16 J and 4 J respectively (3) 4 J and J respectively (4) 4 J and 8 J respectively
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2)There are two electric bulbs of 40 W and 100 w. Which one will be brighter when they are first connected in seried and then in parallel?
(1) 100 W in series and 40 W in parallel (2) 100 W both in series and parallel (3) 40 W in series and 100 W in parallel (4) 40 W both in series and parallel
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3)You are given three bulbs of 25, 40 and 60 W. Which of them has lowest resistance?
(1) 25 W bulb (2) 40 W bulb (3) 60 W bulb (4) Inadequate data
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4) A coil develops heat of 800 cal/sec when potential difference of 20 V is applied across its ends. The resistance of the coil is (Given 1 cal = 4.2 J) (1) 1.2 Ome (2) 1.4 Ome (3) 0.12 Ome (4) 0.14 Ome
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5) Resistance R1 and R2 are joined in parallel and a current is passed so that the amounts of heats liberated are H1 and H2 respectively. The ratio H1/H2 has the value equal to(1) R1/R2 (2) R1 power2/ R2 power2 (3) R power2/R1 (4) R2 power2/R1 power2
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