List of practice Questions

The RMS value of AC is:

The LCR circuit becomes extremely sharp in resonance when:

In the case of a current carrying coil, the induced EMF is maximum when the coil's plane is:

The frequency of AC supply is determined by the:

Our eyes respond to wavelengths ranging from:

A ray of light strikes a piece of glass at an angle of incidence of 60° and the reflected beam is completely plane polarised. The refractive index of glass is:

The series combination of two capacitors shown in the figure is connected across 1000V. The magnitude of the charges on the capacitors will be:

Three resistances of values 2Ω, 3Ω, and 6Ω are to be connected to produce an effective resistance of 4Ω. This can be done by connecting:

The resistance of a field cold measures 50Ω at 20°C and 53Ω at 70°C. The temperature coefficient of resistance is:

The electrolyte used in Leclanché cell is:

A galvanometer has a resistance of 50Ω. If a resistance of 12Ω is connected across its terminals, the total current flow through the galvanometer is:

In a tangent galvanometer, a current of 1A is required to produce a deflection of 60° is:

In the presence of magnetic field \( B \) and electric field \( E \), the total force on a moving charged particle is:

A potential difference of 300 V is applied to a combination of 2.0µF and 8.0µF capacitors connected in series. The charge on the 2.0µF capacitor is:

Two point charges \( +4 \mu C \) and \( -2 \mu C \) are separated by a distance of 1 m. Then, the distance of the point on the line joining the charges, where the resultant electric field is zero, is (in metre):

Figure shows a triangular array of three point charges. The electric potential \( V \) of these source charges at the midpoint \( P \) of the base of the triangle is:

A current of 5A is passing through a metallic wire of cross-sectional area \( 4 \times 10^{-6} \, m^2 \). If the density of the charge carriers in the wire is \( 5 \times 10^{22} \, m^{-3} \), the drift speed of the electrons will be:

At what point of a projectile motion, acceleration and velocity are perpendicular to each other ?

A cell of constant emf first connected to a resistance $R_1$ and then connected to a resistance $R_2$. If power delivered in both cases is same then the internal resistance of the cell is :

The purine base present in RNA is :

If $A =\begin{bmatrix} 3& 5 \\[0.3em] 2 & 0 \\[0.3em] \end{bmatrix}$ and $ \begin{bmatrix} 1& 17 \\[0.3em] 0 & -10 \\[0.3em]\end{bmatrix},$ then $|AB|$ is equal t

The solutions of the equation $ \begin{vmatrix} x & 2& -1 \\[0.3em] 2 & 5 & x \\[0.3em] -1 & 2& x \end{vmatrix}=0$ are

The radius of the circle $x^2+Y^2+4x+6y+13=0$ is

The center of the circle $x = 2 + 3 \cos \theta ,y=3\, \sin \theta -1$ is

The sum of the focal distances of any point on the conic $\frac{x^2}{25}+\frac{y^2}{16}=1$ is