The flow of current in solids is due to? Mark as favorite Copy Link electrons electrons and ions atoms nucleus Check Answer
The electrical energy required to heat a bucket of water to a certain temperature is 4kWh. If the heat losses are 20 percent, the energy input is? Mark as favorite Copy Link 2 kWh 3.2 kWh 6 kWh 6 kWh Check Answer
The draft velocity of electrons is? Mark as favorite Copy Link very small as compared to speed of light equal to speed of light almost equal to speed of light greater than speed of light Check Answer
The resistance of human body is around? Mark as favorite Copy Link 6 ohms 25 ohms 250 ohms 1000 ohms Check Answer
The substances which have a large number of free electrons and offer a low resistance are called? Mark as favorite Copy Link insulators inductors semi-conductors conductors Check Answer
A 40W bulb is connected in series with a room beater. H now 40 W bulb is replaced, by 100 W bulb, the heater output will? Mark as favorite Copy Link decrease increase remain same heater will bum out Check Answer
Out of the following which is not a poor conductor? Mark as favorite Copy Link Cast iron Copper Carbon Tungsten Check Answer
If the efficiency of a machine is to be high, what should be low? Mark as favorite Copy Link Input power Losses True component of power kWh consumed Check Answer
You have to replace 1600? resistor in radio. You have no 1600? resistor but have several 1000? ones which you would connect? Mark as favorite Copy Link two in parallel two in parallel and one in series three in parallel three in series Check Answer
The thickness of insulation provided on the conductor depends on? Mark as favorite Copy Link the magnitude of voltage on the conductor the magnitude of current flowing through it both (a) and (b) none of the above Check Answer