71)The human eye functions on the principle of sensation of
72)An amount of charge passing through any cross-section of the conductor in 1 second is called
73)Which of the following materials obeys the ohm's law
74)Pick the false statement on the metallic conductors
75)The device used to measure the potential difference or electromotive force is
76)The amount of heat required to raise the temperature of 1 gram of water by 1°C is called
77)Two bodies A and B are at temperature -100°C and 173K respectively. The body at higher temperature is
78)Which of the following pairs of substances have the same values of specific heat
79)When touched, we feel that a metal piece is colder than a wooden piece. This is due to the transfer of heat from our fingers to
80)A samosa appears to be cool outside but it is hot when we eat because the curry inside it has ingredients of
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