MCQ
A temporary magnet is made of:
  • Cast iron.
  • B
    Steel.
  • C
    Soft iron.
  • D
    Stainless steel.

Answer

Correct option: A.
Cast iron.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If the polarising angle for air glass interface is $56.3^o$, what is the angle of refraction in glass ?
Work done to bring a unit positive charge from infinity to a point in an electric field is known as $......$?
Two identical thin biconvex lenses of focal length $15\, cm$ and refractive index $1.5$ are in contact with each other. The space between the lenses is filled with a liquid of refractive index $1.25$. The focal length of the combination is $cm$.
The energy of a photon of light of wavelength $450 nm$ is
A cell sends a current through a resistance $R$ for time $t$. Now the same cell sends current through another resistance $r$ for the same time. If same amount of heat is developed in both the resistance, then the internal resistance of cell is
If $n$ represents the order of a half period zone, the area of this zone is approximately proportional to ${n^m}$ where m is equal to
When does a magnetic dipole possess maximum potential energy inside a magnetic field?
For the nuclear fusion reaction ${ }_1^2 H +{ }_1^3 H \rightarrow{ }_2^4 He +{ }_0^1 n$ temperature to which gases must be heated is $3.7 \times 10^9 \,K$. Potential energy between two nuclei is closest to ........ $J$ (Boltzmann's constant $k=1.38 \times 10^{-23} \,J / K$ )
A proton and an $\alpha$ -particle are accelerated through a potential difference of $100\, V$. The ratio of the wavelength associated with the proton to that associated with an $\alpha$ -particle is
A trransistor is connected in common emitter circuit configuration, the collector supply voltage is $10 \,{V}$ and the voltage drop across a resistor of $1000\, \Omega$ in the collector circuit is $0.6\, {V}$. If the current gain factor $(\beta)$ is $24$ , then the base currect is $....\,\mu$ $A.$ (Round off to the Nearest Integer)