81)The SI unit of resistivity is:
82)We get a diminished image with a concave mirror when the object is placed:
83)If the radius of curvature of a spherical mirror is 16 cm, then the focal length of the mirror is:
84)The geometric center of a spherical mirror is called:
85)Which of the following mirrors is used by a dentist to examine a patient's teeth?
86)Tesla is the SI unit of:
87)There is no accumulation of electric charges at any junction in an electric circuit. Which law states this?
88)Solenoid behaves like a ______ when current passes through it:
89)The resistors 2Ω, 4Ω and 6Ω are connected in series. The equivalent resistance is:
90)The current in a wire depends on:
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