The thickness of insulation provided on the conductor depends on Both magnitude of voltage and current The magnitude of voltage on the conductor None of the listed here The magnitude of current flowing through it TRUE ANSWER : ? YOUR ANSWER : ?
Current velocity through a copper conductor is the same as propagation velocity of electric energy of the order of a few ^.s/m nearly 3 x 108 m/s independent of current strength TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the best conductor of electricity? Copper Silver Zinc Gold TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following material has nearly zero temperature co-efficient of resistance? Copper Manganin Porcelain Carbon TRUE ANSWER : ? YOUR ANSWER : ?
Electric current is a Vector quantity Scalar quantity Number only Sometimes scalar and sometimes vector TRUE ANSWER : ? YOUR ANSWER : ?
Voltage dependent resistors are usually made from Charcoal Silicon carbide Nichrome Graphite TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is true both for a series and a parallel D.C. circuit? Voltages are additive Currents are additive Elements have individual currents Power are additive TRUE ANSWER : ? YOUR ANSWER : ?
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will Increases Heater will burn out Decreases Remains same TRUE ANSWER : ? YOUR ANSWER : ?
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is Zero About 2 ohms per degree Positive Negative TRUE ANSWER : ? YOUR ANSWER : ?
Out of the following which is not a poor conductor? Copper Carbon Cast iron Tungsten TRUE ANSWER : ? YOUR ANSWER : ?