A completely filled band is called__________________?

A. Conduction band
B. Valence band
C. Forbidden band
D. Core band

Which one has the greatest energy gap ?

A. Semi conductor
B. Conductor
C. Metals
D. Non metals

With increase in temperature the electrical conductivity of intrinsic semi conductor___________________?

A. Decreases
B. Increases
C. Remains same
D. First increases then decreases

On the basis of band theory of solids the semiconductors have _____________________?

A. A party filled valence band and totally empty conduction band
B. A completely filled valence band a totally empty conduction band and a very wide forbidden band
C. A completely filled valence band a partially filled conduction band and a narrow forbidden band
D. A partly filled valence band a totally empty conduction band and a wide forbidden band

Very weak magnetic fields are detected by___________________?

A. Squids
B. Magnetic resonance imaging (mri)
C. Magnetometer
D. Oscilloscope

Energy needed to magnetize and demagnetize is represented by _________________?

A. Hysteresis curve
B. Hysteresis loop area
C. Hysteresis loop
D. Straight line

What is the SI unit of modulus of elasticity of substance ?

A. Nm-2
B. Jm-2
C. Nm-1
D. Being a number it has no unit.

A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?

A. The extension of the wire is proportional to the force applied
B. The weight of the wire is negligible
C. The wire is not stretched beyond its elastic limit
D. The cross sectional area of the wire remains constant

Formation of large molecule by joining small molecules is_________________?

A. Fusion
B. Polymerization
C. Crystallization
D. Subtraction

The energy band occupied by the valence electrons is called___________________?

A. Energy state
B. Valence band
C. Ve energy state
D. Conduction band