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Q.

Is it true that a glowing bulb's brightness depends upon the current's direction?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
A bulb's brightness or glow can never depend upon the direction of flow of the current. As it is dependent upon the power of the bulb, which is formulated as
P = I2R
Where I is current, and R is the resistance in a circuit
Or we can say that a bulb's brightness depends upon the flow of current and resistance through it.
The correct statement would be, the brightness of a glowing bulb doesn't depend upon the direction of the current.
 
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