Current Electricity The filament of electrical bulb is made of Nickel Steel Tungsten Aluminium Nickel Steel Tungsten Aluminium ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Constantan wire is used for making starndard resistance because it has Negligibly small temperature co-efficient of resistance Low specific resistance High specific resistance High melting point Negligibly small temperature co-efficient of resistance Low specific resistance High specific resistance High melting point ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Resistance of a carbon filament lamp _______ as the applied voltage increases. Remains same Increases Decreases None of the listed here Remains same Increases Decreases None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Insulators have _______ temperature co-efficient of resistance. Negative None of the listed here Positive Zero Negative None of the listed here Positive Zero ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct? 40 W lamp will glow brighter 100 W lamp will glow brighter Both lamps will glow equally bright 40 W lamp will fuse 40 W lamp will glow brighter 100 W lamp will glow brighter Both lamps will glow equally bright 40 W lamp will fuse ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the efficiency of a machine is to be high, what should be low? Input power Losses kWh consumed True component of power Input power Losses kWh consumed True component of power ANSWER DOWNLOAD EXAMIANS APP
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