29. A 100 W bulb is connected in series with a room heater. If now 100 W bulb is replaced by a 40W bulb, the heater output will
A. increase
B. decrease
C. remain same
D. uncertain

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30. An ideal voltage source should have
A. zero source resistance
B. infinite source resistance
C. terminal voltage in proportion to current.
D. terminal voltage in proportion to load.

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31. For a voltage Source, terminal voltage
A. is equal to the source emf.
B. cannot exceed source emf
C. is always lower than source emf
D. is higher than the source emf.

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32. Constant voltage source is
A. active and bilateral.
B. passive and bilateral.
C. active and unilateral.
D. passive and unilateral.

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33. An ideal current source has zero
A. internal conductance.
B. internal resistance.
C. voltage on no load
D. ripple

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34. An active element is
A. Resistance
B. Inductor
C. Current source
D. all of these

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35. The terminals across the source are if a current source is to be neglected.
A. open-circuited
B. short-circuited
C. replaced by a capacitor
D. replaced by a source resistance

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