A one eyed demon has a circular face of radius `a_(0) = 10 cm`. The eye is located at the centre of the face. At what distance from his face he must hold a convex mirror of 5 cm aperture diameter so as to see his complete face? Focal length of the mirror is 10 cm.
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The magnetic field at the centre of a current carrying circular loop of radius R, is B1.
Option : (a) 2√2
2 Answers 1 views
All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cyt
Correct Answer - D Succinate dehyrogenase enzyme is present on inner membrane of mitochondria and catalyses the oxidation of succinate to fumarate
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If current through a circular coil flows in clockwise direction, then the direction of magnetic field at the centre of the circular coil is………………to th
Correct Answer - perpendicular ; inwards,
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Magnetic Induction at the centre of circular coil of radius r carrying current I is-
Correct answer is (A) \(\frac{\mu oI}{2R}\)
2 Answers 1 views
A point charge q has been placed at a distance x from the centre of a neutral solid conducting sphere of radius R(x gt R). Find the potential of the s
Correct Answer - `(1)/(4pi in_(0))(q)/(x)` for both cases
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A circular coil of N turns carries a current I. Field at a distance x from centre of the loop on its axis is B. Write the value of integral `int_(-inf
Correct Answer - `mu_(0)NI`
2 Answers 1 views
A circular coil `P` of `100` turns and radius `2cm` is placed coaxially at the center of another circular coil `Q` of `100` turns and radius `20cm` .
Correct Answer - `(a) 3.94xx10^(-4)H (b) 19.72xx10^(-3)V (c ) 19.72xx10^(-3)Wb//s (d) 9.86xx10^(-5)C`
2 Answers 2 views
A glass sphere with `10 cm` radius has a `5 cm` radius spherical hole at its centre. A narraow beam of parallel light is directed into the sphere. Whe
Correct Answer - 5 cm of the left of the surface of sphere
2 Answers 1 views
An electric bulb is hanging above the centre of a circular table of radiys 3m at a height of 3m from the its centre. Find the ratio of illuminance at
Correct Answer - `2sqrt(2):1`
2 Answers 1 views
Define centre of gravity of a body. Under what conditions the centre of gravity and centre of mass coincide?
1. centre of gravity of a body is the point around which the resultant torque due to force of gravity on the body is zero. 2. The centre of mass coincides...
2 Answers 1 views