Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave:
Two times
Equal
Four times
Half
Specific resistance of silver is:
1.7x10-8 Ω.m
2.63x10-8 Ω.m
2.75x10-8 Ω.m
7.0x10-8 Ω.m
The speed of sound in iron at 25°C is:
5950 m/sec
5900 m/sec
6950 m/sec
6940 m/sec
The basic operations performed by a computer are:
Arithmetic operations
Non-arithmetic operations
Logical operations
Both a and c
An object is placed at the Centre of curvature of a concave mirror. The image produced by the mirror is located:
Out beyond the centre of curvature
At the centre of curvature
Between the centre of curvature and the focal point
At the focal point
Simplest electrical circuits use:
One wire
Two wires
Four wires
Five wires
