List of practice Questions

When distance between object and screen is more than 4 times the focal length, in how many positions of the convex lens, image is sharp ?
If object and image lie on the same side of a mirror, the mirror is
Focal plane of a spherical mirror is
When a set of parallel rays of light inclined at 15° to the principal axis, are incident on a convex lens, they
To find normal to a curved surface at a point, join that point and
H.C.F. of 8, 9 and 25 is______
What is the degree of the polynomial \(7u^6 - \frac{3}{2}u^4 + 6u^2 - 8\) ?
The zeroes of the quadratic polynomial \(x^2+24x+119\) are
Cardinal number of the set A={-2, -1,0,1,2} is
The value of loge \(e{\sqrt{e}}\) is
If the area of the parallelogram with \(\vec{a}\) and \(\vec{b}\) as two adjacent sides is 15 sq.units then the area of the parallelogram having \(3\vec{a}+2\vec{b}\) and \(\vec{a}+3\vec{b}\) as two adjacent sides in sq.units is
A proton moving with a momentum $P _{1}$ has a kinetic energy $\frac{1}{8}$ th of its rest mass energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum $P _{2} .$ Then the ratio $\frac{ P _{1}- P _{2}}{ P _{1}}$ is equal to
Three persons enter into a partnership by investing in the ratio of 9:8:1. After one year P double his investment and R puts another Rs.6000 to the initial investment. Now the ratio of investment is 9:8:2. What is total investment of P,Q and R after 2 years?
A copper rod $AB$ of length $l$ is rotated about end A with a constant angular velocity $\omega$. The electric field at a distance $x$ from the axis of rotation is
A transistor amplifier along with a tank circuit with positive feedback will act as
In p-type semiconductors
The number of six membered and five membered rings in Buckminster Fullerence respectively is
If the mass numbers of two nuclei are in the ratio 3: 2, then the ratio of their nuclear densities is :
In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is
Primary structure in a nucleic acid contains bases as G A T G C …..… The chain which is complementary to this chain is
The ratio of the total energy E of the electron to its kinetic energy K in hydrogen atom is
The property of the alkaline earth metals that increases with their atomic number is
1018 fissions per second is required for producing power of 300 MW in a nuclear power station. To increase the power output to 360 MW the additional number of fissions required per second is
RNA and DNA are chiral molecules, their chirality is due to the presence of
During $ẞ^{-}$ decay of a radioactive element there is an increase in its