Download App

Model Paper 9 — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsModel Paper 91 Mark
MCQ
Assertion (A): When a body is dropped or thrown horizontally from the same height, it would reach the ground at the same time.
Reason (R): Horizontal velocity has no effect on the vertical direction.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
✓

Answer

(a) Both A and R are true and R is the correct explanation of A.
Explanation: Horizontal velocity provides the horizontal range. It does not affect the time taken in the vertical direction.

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 "Assertion (A) & Reason (B) MCQ" from Model Paper 9→Model Paper 9 — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Assertion (A): Power developed in circular motion is always zero.
Reason (R): Work done in case of circular motion is zero.
→
Assertion (A): Efficiency of a Carnot engine increases on reducing the temperature of sink.
Reason (R): The efficiency of a Carnot engine is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source.
→
Assertion (A): A quick collision between two bodies is more violent than slow collision, even when initial and final velocities are identical.
Reason (R): The rate of change of momentum determines that the force is small or large.
→
Assertion (A): Generally the path of a projectile from the earth is parabolic but it is elliptical for projectiles going to a very large height.
Reason (R): The path of a projectile is independent of the gravitational force of earth.
→
Assertion (A): If $\vec{A} \cdot \vec{B}=\vec{B} \cdot \vec{C}$, then $\vec{A}$ may not always be equal to $\vec{C}$.
Reason (R): The dot product of two vectors involves cosine of the angle between the two vectors.
→
Assertion: Moon travellers tie heavy weight at their back before landing on moon.
Reason: The value of g is small at moon.
→
Assertion (A): Two springs of force constants $k_1$ and $k_2$ are stretched by the same force. If $k_1>k_2$, then work done in stretching the first $\left( W _1\right)$ is less than work done in stretching the second $\left( W _2\right)$.
Reason ( R ): $F = k _1 x _1= k _2 x _2$
→
Assertion (A): The force of attraction due to a hollow spherical shell of uniform density, on a point mass situated inside it is zero.
Reason (R): Various region of the spherical shell attract the point mass inside it in various directions. These forces cancel each other completely.
→
Assertion (A): According to the law of conservation of mechanical energy change in potential energy is equal and opposite to the change in kinetic energy.
Reason (R): Mechanical energy is not a conserved quantity.
→
Assertion (A): The division of a vector by another vector is not defined.
Reason (R): The division of a vector by a direction is not possible.
→