Which one of the following material has high resistivity
A) silicon
B) wet wood
C) glass
D) rubber
1 Answers
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The Young’s modulus of a material is 10^11 Nm^-2 and its Poisson’s ratio is 0.2. The modulus of rigidity of the material is
Correct option is: (A) 0.42 × 1011 N/m2
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The refractive index of a material is 1. If the speed of light in vacuum is 3 × 108 ms^-1 then the speed of light in that material is ………………..
B) 3 × 108 m/s
1 Answers 1 views
Which of the following metal conductors has least resistivity value?
Correct option is B) silver
2 Answers 1 views
A wire of length lm and radius 0.1 mm has a resistance of 100 Ω. The resistivity of the material is ………………….
B) 3.14 × 10-6 Ω – m
2 Answers 1 views
Which among the following materials have their resistivity of the order of 1014 to 1016 Ω – m
C) insulators
2 Answers 1 views
Which among the material has greater resistivity at room temperature ?
Correct option is B) Glass
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The resistivity of Nichrome is 10^-6 Ω-m. The wire of this material has radius of 0.1 mm with resistance 100 Ω, then the length will be
Correct option is: (A) 3.142 m
2 Answers 1 views
The frequency of a light wave in a material is 2 x 10^14 Hz and wavelength is 5000 Å. The refractive index of material will be (a) 1.40
Answer is : (c) 3
2 Answers 2 views
In Hydra, waste material of food digestion and nitrogenous waste material are removed from
Correct Answer - C Mouth and body wall respectively
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Two wires are made of the same material and have the same volume. However, wire 1 has cross-sectional area `A` and wire 2 has cross-sectional area `3A
Correct Answer - 9 9
2 Answers 1 views