Short Answer Typei) What is an ohmic resistor?
ii) Two copper wires are of the same length, but one is thicker than the other.
1. Which wire will have more resistance?
2. Which wire will have more specific resistance?i)
Ohmic resistors: The conductors which obey ohm’s law are called the ohmic ressitors or linear resistances. For such resistors, a graph plotted for the potential difference V against I is a straight line.
What is consumed using different electrical appliances, for which electricity bills are paid?
Two sets A and B, of the three bulbs each, are glowing in two separate rooms. When one of the bulbs in set A is fuses, the other two bulbs also cease to glow. But, in set B, when ne bulb fuses, the other two bulbs continue to glow. Explain why this phenomenon occurs.
Name two factors on which the magnitude of an induced e.m.f. in the secondry coil depends upon?
In the following diagram an arrow shows the motion of the coil towards the bar magnet.
1. State in which dirction the current flows, A to B or B to A?
2. Name the law used to come to the conclusion.50 g of metal piece at 27o C requires 2400 J of heat energy so as to attain a temperature of 327o C. Calculate the specific heat capacity of the metal.
i) What is nuclear energy?
ii) Name the process used for producing electricity usign nuclear energy.State one important advantage and disadvantage each of using nuclear energy for producing electricity.
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