Download App

Electron, Photon, Photoelectric Effect and X-Rays — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectron, Photon, Photoelectric Effect and X-Rays1 Mark
MCQ
Assertion : X-ray travel with the speed of light.
Reason : X-rays are electromagnetic rays.
  • ✓
    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

Correct option: A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
 If both assertion and reason are true and the reason is 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

Explore more

More "M.C.Q (1 Marks)" from Electron, Photon, Photoelectric Effect and X-Rays→Electron, Photon, Photoelectric Effect and X-Rays — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The work function of caesium is $2.14\, eV$. Find the wavelength of the incident light if  the photo current is brought to zero by a stopping potential of $0.60\, volt$ :- .............. $nm$
→
An extremely hot star would appear to be
→
A convex mirror has a radius of curvature of $22 \;cm$. If an object is placed $14 \;cm$ away from the mirror then its image is formed at
→
Which of the following graphs shows the variation of thermoelectric power with temperature difference between hot and cold junction in thermocouples
→
The phase difference between the alternating current and emf is $\frac{\pi }{2}$ .Which of the following cannot be the constituent of the circuit?
→
A biconvex lens of focal length f is cut into two identical plano convex lenses. The focal length of each part will be
→
An electron moving towards the east enters a magnetic field directed towards the north. The force on the electron will be directed
→
If a coil made of conducting wires is rotated between poles pieces of the permanent magnet. The motion will generate a current and this device is called
→
Because we cannot ever know the initial conditions of groups of objects with perfect precision, the later behaviour of complex systems of objects may be almost completely unpredictable, even the wonderfully successful equations derived from Newtonian mechanics.
The previous statement describes the essence of which theory?
→
Seven capacitors each of capacity 2μF are to be so connected to have a total capacity $\frac{10}{11}\mu F$. Which will be the necessary figure as shown 
→