Download App

Atomic and Nuclear Physics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsAtomic and Nuclear Physics1 Mark
Question

Assertion  : Isobars are the element having same mass number but different atomic number.

Reason      : Neutrons and protons are present inside nucleus.

(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

Explore more

More "M.C.Q (1 Marks)" from Atomic and Nuclear Physics→Atomic and Nuclear Physics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Two capacitors of 10 μF  and 20 μF  are connected in series with a 30V battery. The charge on the capacitors will be, respectively

(a) 100 μC, 200 μC

(b) 200 μC, 100  μC

(c) 100 μC, 100 μC

(d) 200 μC, 200 μC
→
The acceleration of moon with respect to earth is 0⋅0027ms-2 and the acceleration of an apple falling on earth's surface is about 10ms-2. Assume that the radius of the moon is one fourth of the earth's radius. If the moon is stopped for an instant and then released, it will fall towards the earth. The initial acceleration of the moon towards the earth will be:
  1. 10ms-2
  2. 0.0027ms-2
  3. 6.4ms-2
  4. 5.0ms-2
→

The impurity atoms which are mixed with pure silicon to make a P-type semiconductor are those of

(a) Phosphorus

(b) Boron

(c) Antimony

(d) Copper
→

Hubble showed that the universe as a whole is expanding and the distant stars are receding from us. The spectral line from a star, when compared with the corresponding line from an source will then show

(a) A shift in frequency towards the red end

(b) A shift in frequency towards the violet end

(c) No shift in frequency at all

(d) A shift in frequency towards the violet end as well as a decrease in intensity

→
In a circuit, the current lags behind the voltage by a phase difference of $\frac{\pi}{2}$ the circuit will contain which of the following: 
→

Three identical point charges, as shown are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse

(a) 1

(b) 2

(c) 3

(d) 4
→

What is the current (i) in the circuit as shown in figure

(a) 2 A

(b) 1.2 A

(c) 1 A

(d) 0.5 A
→
Einstein was awarded Noble prize for:
→

A new flashlight cell of e.m.f. 1.5 volts gives a current of 15 amps, when connected directly to an ammeter of resistance 0.04Ω. The internal resistance of cell is

(a) 0.04 Ω

(b) 0.06 Ω

(c) 0.10 Ω

(d) 10 Ω

→

If the focal length of objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25 cm away from the objective lens and the final image is formed at infinity. The magnifying power of the microscope is

(a) 150 

(b)  200 

(c) 250 

(d)  400 
→