List of practice Questions

On increasing the temperature of a conductor, for free electrons ______ increases.
The Wheatstone bridge is in balanced condition in the given figure (assume branches are 2$\Omega$, 6$\Omega$, X, and 12$\Omega$ in order), then X = ______.
The emf of a storage battery of a car is 6.0 V. If internal resistance of the battery is 0.2 $\Omega$, then maximum power drawn from the battery is ____ W.
A metal rod of length 10 cm and a rectangular cross section of 1 cm $\times$ 1/2 cm is connected to a battery across opposite faces. The resistance will be _____.
An electric dipole of dipole moment $\vec{P}$ is placed parallel to the uniform electric field of intensity $\vec{E}$. On rotating it through angle of 90° from this situation, the amount of work done is ______.
The total charge on a uniformly charged spherical shell having radius R is Q. Then electric potential at a distance $r = R/2$ from the centre of the shell ______.
A parallel plate capacitor with air between the plates has a capacitance of 1.0 pF. If the distance between the plates is made doubled and space between them is filled with dielectric substance, the capacitance becomes 2.0 pF. Then the value of dielectric constant of dielectric substance is ______.
Two infinitely long thin straight parallel wires are kept a perpendicular distance $2R$ having uniform linear charge densities $+\lambda$ and $-\lambda$ respectively. The magnitude of electric field at a mid point between two wires will be ______.
If charge $q$ is placed on one of the vertex of a cube, then total electric flux passing through the cube is ______.
A proton and a $\alpha$-particle are placed in uniform electric field. Accelerations produced in them are $a_p$ and $a_\alpha$ respectively. Then $a_p : a_\alpha$ will be ______.
Out of the following impurities, which impurity is not a trivalent?
If the output frequency of a full-wave rectifier is 100 Hz, then input frequency will be ______.
When a forward bias is applied to a p-n junction. It ______.

Identify the correct truth table of the given logic circuit. 

Consider a mixture $X$ which is made by dissolving $0.4$ mol of $[\mathrm{Co(NH_3)_5SO_4}]Br$ and $0.4$ mol of $[\mathrm{Co(NH_3)_5Br}]SO_4$ in water to make $4$ L of solution. When $2$ L of mixture $X$ is allowed to react with excess $\mathrm{AgNO_3}$, it forms precipitate $Y$. The rest $2$ L of mixture $X$ reacts with excess $\mathrm{BaCl_2}$ to form precipitate $Z$. Which of the following statements is CORRECT?
MnO₄²⁻, in acidic medium, disproportionates to:

The wavelength of spectral line obtained in the spectrum of Li$^{2+}$ ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is
 

Let $z=(1+i)(1+2i)(1+3i)\cdots(1+ni)$, where $i=\sqrt{-1}$. If $|z|^2=44200$, then $n$ is equal to
Number of solutions of \( \sqrt{3} \cos 2\theta + 8 \cos \theta + 3\sqrt{3} = 0, \theta \in [-3\pi, 2\pi] \) is:
The escape velocity from a spherical planet \(A\) is \(10\ \text{km/s}\). The escape velocity from another planet \(B\), whose density and radius are \(10%\) of those of planet \(A\), is _______ m/s.

Look at the given image and identify the ancient sculptural panel from the options:  

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Arrange the following historical events in chronological order and choose the correct option: I. Champaran Satyagraha
II. Kheda Satyagraha
III. Jallianwala Bagh Incident
IV. Rowlatt Act
Options:
Name any two centres of Indian National Movement.
Mention any one medieval town.
Name any one town which was under the rule of Babur.