The minimum charge on an ion is? Mark as favorite Copy Link equal to the atomic number of the atom equal to the charge of an electron equal to the charge of the number of electrons in an atom zero Check Answer
The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is? Mark as favorite Copy Link 50% 60% 100% 150% Check Answer
A field of force can exist only between? Mark as favorite Copy Link two molecules two ions two atoms two metal particles Check Answer
The condition for the validity under Ohm’s law is that? Mark as favorite Copy Link resistance must be uniform current should be proportional to the size of the resistance resistance must be wire wound type temperature at positive end should be more than the temperature at negative end Check Answer
A substance whose molecules consist dissimilar atoms is called? Mark as favorite Copy Link semi-conductor super-conductor compound insulator Check Answer
When current flows through heater coil it glows but supply wiring does not glow because? Mark as favorite Copy Link current through supply line flows at slower speed supply wiring is covered with insulation layer resistance of heater coil is more than the supply wires supply wires are made of superior material Check Answer
An electric filament bulb can be worked from? Mark as favorite Copy Link D.C. supply only A.C. supply only Battery supply only All above Check Answer
…… are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators? Mark as favorite Copy Link Varistors Thermistor Semi-conductors Variable resistors Check Answer
An open resistor, when checked with an ohm-meter reads? Mark as favorite Copy Link zero infinite high but within tolerance low but not zero Check Answer
Switching of a lamp in house produces noise in the radio. This is because switching operation produces? Mark as favorite Copy Link arcs across separating contacts mechanical noise of high intensity both mechanical noise and arc between contacts none of the above Check Answer