Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power Input power kWh consumed Losses True component of power Input power kWh consumed Losses ANSWER DOWNLOAD EXAMIANS APP
Current Electricity All of the following are equivalent to watt except Joules/sec. Amperes × volts Amperes/volt (Amperes) ohm Joules/sec. Amperes × volts Amperes/volt (Amperes) ohm ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two lamps 100 W and 40 W are connected in series across 230 V. Which of the following statement is correct? 100 W lamp will glow brighter 40 W lamp will glow brighter 40 W lamp will fuse Both lamps will glow equally bright 100 W lamp will glow brighter 40 W lamp will glow brighter 40 W lamp will fuse Both lamps will glow equally bright ANSWER DOWNLOAD EXAMIANS APP
Current Electricity With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals 60 W 40 W 10 W 20 W 60 W 40 W 10 W 20 W ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as 4 : 25 5 : 2 2 : 5 25 : 4 4 : 25 5 : 2 2 : 5 25 : 4 ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.6 ohm 0.4 ohm 1.0 ohm 0.8 ohm 0.6 ohm 0.4 ohm 1.0 ohm 0.8 ohm ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS