Question
Write any two examples of paramagnetic substances.
✓
Answer
(i) Copper chloride and (ii) Manganese dioxide
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
In a transistor, doping level in base is increased slightly. How will it affect (i) collector current and (ii) base current?
${32}P$ beta-decays to ${32}S$. Find the sum of the energy of the antineutrino and the kinetic energy of the $\beta-$particle. Neglect the recoil of the daughter nucleus. Atomic mass of ${32}P = 31.974u$ and that of ${32}S = 31.972u$.
→A point charge $+Q$ is placed at point $O$ as shown in the figure. Is the potential difference $V_A – V_B$ positive, negative or zero$?$
→Consider the situation of the previous problem. If the mirror reflects only 64% of the light energy falling on it, what will be the ratio of the maximum to the minimum intensity in the interference pattern observed on the screen?
Choose the correct alternative:
The resistivity of the alloy manganin is nearly independent of/ increases rapidly with increase of temperature.
The resistivity of the alloy manganin is nearly independent of/ increases rapidly with increase of temperature.
When a photon of 5 eV incident on a metal, the value of stopping potential of the emitted photoelectron is 3.2 volt. What is the work function of the metal?
Write the following in descending order of wavelength:
Gamma rays, Hertzian waves, yellow light, blue light, infrared radiation, ultraviolet radiation, X-rays, γ-rays.
Gamma rays, Hertzian waves, yellow light, blue light, infrared radiation, ultraviolet radiation, X-rays, γ-rays.
Mark the correct options.
- The luminous efficiency of a monochromatic source is always greater than that of a white light source of same power.
- The luminous efficiency of a monochromatic source of wavelength 555nm is always greater than that of a white light source of same power.
- The illuminating power of a monochromatic source of wavelength 555nm is always greater than that of a white light source of same power.
- The illuminating power of a monochromatic source is always greater than that of a white light source of same power.
Define the term ‘dielectric constant’ of a medium in terms of capacitance of a capacitor.
What type of semiconductor is obtained by adding impurity of gallium to germanium?