Question
When a semiconductor is heated, its resistance(a) Decreases(b) Increases(c) Remains unchanged(d) Nothing is definite
✓
Answer
(a) Decreases
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Nuclear binding energy is equivalent to(a) Mass of proton(b) Mass of neutron(c) Mass of nucleus(d) Mass defect of nucleus
Assertion : The comet do not obey Kepler's laws of planetary motion
Reason : The comet do not have elliptical orbit(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : The comet do not have elliptical orbit(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
The first model of atom in 1898 was proposed by:
The ammeter $A$ reads $2\ A$ and the voltmeter $V$ reads $20\ V.$ the value of resistance $R$ is $($Assuming finite resistance's of ammeter and voltmeter$)$
→A magnetic dipole of length $10\ cm$ has pole strength of $20Am.$ Find the magnetic moment of the dipole.
→The desirable properties for making permanent magnets are:
- High retentivity and high coercive force.
- High retentivity and low coercive force.
- Low retentivity and high coercive force.
- Low retentivity and low coercive force.
A single slit of width 0.20 mm is illuminated with light of wavelength 500 nm. The observing screen is placed 80 cm from the slit. The width of the central bright fringe will be(a) 1 mm(b) 2 mm (c) 4 mm (d) 5 mm
The critical angle of light passing from glass to air is minimum for :
The velocity of emitted electrons in photelectric effect depends :
A beam of electrons is moving with constant velocity in a region having electric and magnetic fields of strength $20\ Vm ^{-1}$ and $0.5 T$ at right angles to the direction of motion of the electrons. What is the velocity of the electrons
→