26. A battery of emf 12 V whose internal resistance is negligible is connected across a 10 Q resistor in parallel with a resistor of resistance R. If the battery current is 2 A, the value of R is O 3.75 Q O 60 O 15 0 20 Q
26. A battery of emf 12 V whose internal resistance is negligible is connected across a 10 Q resistor in parallel with a resistor of resistance R. If the battery current is 2 A, the value of R is O 3.75 Q O 60 O 15 0 20 Q
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Transcribed Image Text:26. A battery of emf 12 V whose internal resistance is negligible is
connected across a 10 Q resistor in parallel with a resistor of resistance R.
If the battery current is 2 A, the value of R is.*
O 3.75 Q
O 60
15 Q
20 Q
27. A battery of 12 V and internal resistance of 1 ohm is connected across a
3-ohm resistor. The potential difference across the resistor is.
2.25 V
O3 V
9 V
O 12 V
Transcribed Image Text:22. A resistor R is connected to a battery dissipates energy at the rate P. If
another resistor is connected in parallel with R, the power dissipated by R
is *
O Less than P
O P
O More than P
O Any of the above, depending on the values of the resistances
23. The second resistor of question 22 is connected in series with R. The
power dissipated by R is now *
OLess than P
O P
O More than P
OAny of the above, depending on the values of the resistances
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