List of practice Questions

The area under the displacement-force curve gives

The height of the dam, in a hydroelectric power station is $ 10 \,m $ . In order to generate $ 1 \,MW $ of electric power, the mass of water (in kg) that must fall per second on the blades of the turbines is

The resonance frequency of the tank circuit of an oscillator when $ L=\frac{10}{{{\pi }^{2}}}mH $ and $ C=0.04\text{ }\mu F $ are connected in parallel is

A solid cylinder is rolling down on an inclined plane of angle $ \theta , $ The coefficient of static friction between the plane and cylinder is $ \mu _{s}$ . Then condition for the cylinder not to slip is

Nitration of nitrobenzene at $ 125^{\circ} C $ with mixed acids gives

The average kinetic energy of a gas molecule is

The magnetic susceptibility of paramagnetic materials is

The products obtained when anisole is heated in a sealed tube with $HI$ are

To convert a moving coil galvanometer $(MCG)$ into a voltmeter

The metallurgical process in which a metal is obtained in a fused state is called

IUPAC name of $CH _{3}- \underset{\overset{|}{Cl}}{C}H - CH _{2}- CHO$ is $Cl$

According to Lenz's law of electromagnetic induction

Consider a thin spherical shell of radius $R$ consisting of uniform surface charge density $\sigma$ The electric field at a point of distance $x$ from its centre and outside the shell is

The net magnetic flux through any closed surface, kept in a magnetic field is

The energy released in the fission of $ 1 \,kg $ of $ _{92}{{U}^{235}} $ is (energy per fission = 200 MeV)

The latent heat of fusion of ice at $0^{\circ} C$ is $80\, cal / g$. Entropy change $(\Delta S)$ accompanying the melting of $1\, g$ of ice at $0^{\circ} C$ would be (units: $cal / g / K$ )

The work done in bringing at a unit positive charge from infinity distance to a point at distance $x$ from a positive charge $Q$ is $W$. Then the potential $ \phi $ at that point is

The frequency of the fundamental note in a wire stretched under tension $T$ is $f$. If the tension is increased to $25 \,T$, then the frequency of the fundamental note will be

When a $p-n$ junction diode is connected in forward bias its barrier potential

A body moving along a circular path of radius $R$ with velocity $v$, has centripetal acceleration a. If its velocity is made equal to $2v$, then its centripetal acceleration is

Kirchhoff's second law for the analysis of circuit is based on

Wien 's displacement law for emission of radiation can be written as $(\lambda_{max}$ = wavelength whose energy density is greatest)

The capacitance $C$ of a capacitor is

$Di$-chloroacetic acid is a stronger acid than acetic acid. This is due to occurrence of

Electron density in the $y z$-plane of $3 d_{x^{2}-y^{2}}$ orbital is