Last Answer : 1/R=1/R1+1/R2+1/R3+1/R4 =1/10+1/10+1/10+1/10 =4/10 R =0.4 ohms...
What inductance will give the same reactance as a capacitor of 2 μF when both are at 50 Hz? a. 5H b. 10H c. 15H d. 20H Last Answer : Ans. a. 5H ...
Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why? Last Answer : Since two bulbs are in series they will get equal amount of electrical current but as the supply voltage is constant across the bulb (P=V^2/R).So the resistance of 40W bulb is greater and voltage across 40W is more (V=IR) so 40W bulb will glow brighter....
What is the permissible rise of temperature in a well-designed generator? Last Answer : 27 degree C above the surrounding air...
What will happen if we give 220 Volt DC supply to a bulb or tube light? Last Answer : Bulbs (devices) for AC are designed to operate such that it offers high impedance to AC supply. Normally they have low resistance. When DC supply is applied, due to low resistance, the current through the lamp would be so high that it may damage the bulb element...
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