Question
Assertion  :   A spark occur between the poles of a switch when the switch is opened.
Reason      : Current flowing in the conductor produces magnetic field.(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.
 
 
 
 

Answer

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

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

In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of       (a) 1 MeV(b) 0.1 MeV(c) 1eV    (d) 5 eV
       
An oil drop having charge $2 e$ is kept stationary between two parallel horizontal plates $2.0 \ cm$ apart when a potential difference of $12000$ volts is applied between them. If the density of oil is $900 \mathrm{~kg} / \mathrm{m}^3$, the radius of the drop will be
The electric field at a point on equatorial line of a dipole and direction of the dipole moment:
The electric field inside a spherical shell of uniform surface charge density is:
For two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
Wavefront of a wave has direction with wave motion:
Fusion reaction takes place at high temperature because(a) Atoms are ionised at high temperature(b) Molecules break-up at high temperature(c) Nuclei break-up at high temperature (d) Kinetic energy is high enough to overcome repulsion between nuclei
 
 
 
 
Magnetic flux in a circuit containing a coil of resistance 2Ω changes from 2.0 Wb to 10 Wb in 0.2 sec. The charge passed through the coil in this time is(a) 0.8 C(b) 1.0 C(c) 5.0 C(d) 4.0 C
       
Consider the following two statements
A. Energy spectrum of a-particles emitted in radioactive decay is discrete
B. Energy spectrum of b-particles emitted in radioactive decay is continuous(a) Only A is correct(b) Only B is correct(c) A is correct but B is wrong(d) Both A and B are correct
   
   
Assertion   :   The ferromagnetic substance do not obey Curie’s law.
Reason       : At Curie point a ferromagnetic substance start behaving as a paramagnetic substance.(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.