81. Vector quantities have
						
					82. What is the unit of electric potential?
						
					83. Which of the following quantities has the SI unit as Candela?
						
					84. Which one of these is a symbol of mole in SI unit?
						
					85. What is the SI unit of wavelength?
						
					86. What is the unit pf relative density?
						
					87. ms-2 is SI unit of which of the following?
						
					88. Which of the following units is used for measuring the amount of a substance?
						
					89. SI unit of electric charge is-
						
					90. 1 Pico meter = ?
						
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