List of practice Questions

If the radius of curvature of a spherical mirror is 16 cm, then the focal length of the mirror is:
The geometric center of a spherical mirror is called:
How many times does a ray of light refract when it passes through a prism?
Which of the following is used in household circuits to prevent damages due to overloading?
The SI unit of resistivity is:
We get a diminished image with a concave mirror when the object is placed:
Lenz's law explains about:
The formula for power of a lens is:
Electric motor converts:
The lens used to correct myopia is:
Which law indicates this relation?
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The shape of the magnetic field lines around a straight wire carrying current is:
Which of the following is constant throughout a uniform magnetic field?
The force on a current-carrying conductor placed in a magnetic field becomes zero, when it is:
A prism is made with a material of refractive index \( \mu = 2 \). The angle of prism is 60°. The angle of minimum deviation produced by the prism is:
When a convex lens is placed in water, its focal length:
A watch repairer uses a magnifying glass to see the tiny parts of a watch. Which of the following lenses is used?
An air bubble in water behaves like:
What do the cones in our eyes identify?
Which of the following works on the principle of electromagnetic induction?
Which of the following is the lens maker's formula?
The focal plane of a lens is a plane:
The angle of vision for a healthy human being is about:
The maximum number of parallel tangents that can be drawn to a circle is:
Let \( \vec{p} = 2\hat{i} - 3\hat{j} - \hat{k} \), \( \vec{q} = -3\hat{i} + 4\hat{j} + \hat{k} \) and \( \vec{r} = \hat{i} + \hat{j} + 2\hat{k} \). Express \( \vec{r} \) in the form of \( \vec{r} = \lambda \vec{p} + \mu \vec{q} \) and hence find the values of \( \lambda \) and \( \mu \).