Which combination forms NAND gate:
AND & OR
AND & NOT
NOT & OR
NAND & NOT
Which type of image is produced by the converging lens of human eye if it views a distant object:
Real, erect, same size
Real, inverted, diminished
Virtual, erect, diminished
Virtual, inverted, magnified
The diameter of spherical mirror is called:
Curvature
Aperture
Sphere
Both a and b
The point through which rays of light pass after reflection from concave mirror is called principal:
Focus
Circle
Axis
Radius
Half of radius of curvature is called:
Focal length
Principal focus
The distance between principal focus and pole of mirror is called:
Image