Current Electricity A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be 9 Ω 11 Ω 10 Ω 12.1 Ω 9 Ω 11 Ω 10 Ω 12.1 Ω 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 40 W lamp will fuse 100 W lamp will glow brighter Both lamps will glow equally bright 40 W lamp will glow brighter 40 W lamp will fuse 100 W lamp will glow brighter Both lamps will glow equally bright ANSWER DOWNLOAD EXAMIANS APP
Current Electricity The substances which have a large number of free electrons and offer a low resistance are called Inductors Conductors Insulators Semi-conductors Inductors Conductors Insulators Semi-conductors ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Electric current passing through the circuit produces Magnetic effect Thermal effect Chemical effect Luminous effect Magnetic effect Thermal effect Chemical effect Luminous effect ANSWER DOWNLOAD EXAMIANS APP
Current Electricity Voltage dependent resistors are used To suppress surges As current stabilizers As heating elements For inductive circuits To suppress surges As current stabilizers As heating elements For inductive circuits ANSWER DOWNLOAD EXAMIANS APP
Current Electricity If the efficiency of a machine is to be high, what should be low? True component of power kWh consumed Losses Input power True component of power kWh consumed Losses Input power ANSWER DOWNLOAD EXAMIANS APP
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