List of top Physics Questions

A solid sphere of mass $10\text{ kg}$ and radius $0.2\text{ m}$ is rolling without slipping on a horizontal floor with a velocity of $5\text{ m/s}$. Its total kinetic energy is:
A bullet of mass $10\text{ g}$ moving horizontally with a velocity of $400\text{ m/s}$ strikes a wooden block of mass $3.99\text{ kg}$ suspended by a long string and gets embedded in it. The vertical height to which the block rises is ($g = 10\text{ m/s}^2$):
A uniform metal chain of length $2\text{ m}$ and mass $4\text{ kg}$ is lying on a horizontal table with $30\%$ of its length hanging down over the edge. The work done in pulling the hanging part back onto the table is ($g = 10\text{ m/s}^2$):
A particle of mass $0.5\text{ kg}$ undergoes a collision where its velocity changes from $4\hat{i}\text{ m/s}$ to $-3\hat{j}\text{ m/s}$. The magnitude of impulse imparted to the particle is:
A projectile is thrown with a speed of $40\text{ m/s}$ at an angle of $60^\circ$ with the horizontal. Its radius of curvature at the highest point of its trajectory is ($g = 10\text{ m/s}^2$):
A body moves from rest with a uniform acceleration of $4\text{ m/s}^2$. The distance covered by it in the 5th second of its motion is:

कार्य फलन वाले एक धातु के लिए, निम्नलिखित में से कौन-सी तरंगदैर्ध्यों की आपतित विकिरणें, प्रकाश-विद्युत प्रभाव नहीं दर्शाएँगी ? (प्लांक नियतांक 6.6 \( \times \) 10\(^{-34}\) J s लीजिए) 
 

एक क्रेन, जो 1000 kg के द्रव्यमान को 20 m की ऊँचाई तक 10 s में उठाती है, की शक्ति है। (\(g=9.8 \, m/s^2\)) 
 

The half-life of a radioactive substance is 10 days. The decay constant is
A p-n junction diode acts as a closed switch when it is
A convex lens of focal length $20 \text{ cm}$ is placed in contact with a concave lens of focal length $40 \text{ cm}$. The power of the combination is}
In an AC circuit containing only an inductor, the current [H] [width=0.5\linewidth]{113.png}
The velocity of electromagnetic waves in vacuum is given by
The self-inductance of a solenoid of length $l$, area of cross-section $A$ and number of turns $N$ is proportional to
In Young's double-slit experiment, the fringe width is proportional to
A wire of resistance $R$ is stretched to double its original length. Its new resistance will be [H] [width=0.5\linewidth]{107.png}
The magnetic susceptibility is negative for:
The force experienced by a charge $q$ moving with velocity $v$ in a magnetic field $B$ is maximum when the angle between $v$ and $B$ is
According to Ohm's law, the relation between the electric current $I$ and the potential difference $V$ across a conductor is
Three capacitors of capacitances $3\ \mu\text{F}$, $3\ \mu\text{F}$ and $3\ \mu\text{F}$ are connected in series. The equivalent capacitance is}
In a Wheatstone bridge, the bridge is balanced when the ratio of the resistances in the four arms satisfies [H] [width=0.5\linewidth]{108.png}
The magnetic field at the centre of a circular coil of radius $r$ carrying a current $I$ is proportional to
The electrostatic force between two charges $q_1$ and $q_2$ separated by a distance $r$ in vacuum is $F$. If a dielectric medium of dielectric constant $K$ is introduced between them, the new force is
The apparent frequency of a siren increases as the source approaches a stationary observer. This phenomenon is known as
The time period of a simple pendulum of length $l$ is $T$. If its length is increased to $4l$, its new time period will be