List of top Physics Questions on Current electricity asked in MHT CET

To convert a galvanometer into a voltmeter, one must connect a:

What is the shunt resistance \(S\) needed if the galvanometer current \(I_g\) is \(8\%\) of the total current \(I\)?

In metre-bridge experiment the balance point is obtained if the gaps are closed by \(2 \Omega\) and \(3 \Omega\). A shunt of \(x \Omega\) is added to \(3 \Omega\) resistor to shift the balance point by \(22.5 \text{ cm}\). The value of \(x\) is.

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

When a big drop of water is formed from ' \(n\) ' small drops of water, the energy loss is ' \(3E\) ' where ' \(E\) ' is the energy of the bigger drop. The radius of the bigger drop is ' R ' and that of smaller drop is ' \(r\) ' then the value of ' \(n\) ' is

In Young's double slit interference experiment, using two coherent sources of different amplitudes, the intensity ratio between bright to dark fringes is \(5 : 1\). The value of the ratio of resultant amplitudes of bright fringe to dark fringe is

A string of mass \(0.1\text{ kg m}^{-1}\) has length \(0.9\text{ m}\). It is fixed at both ends and stretched such that it has a tension of \(40\text{ N}\). The string vibrates in three segments with amplitude \(0.3\text{ cm}\). The amplitude (maximum) of the particle velocity is (in \(\text{m/s}\))

Two conducting circular loops of radii \(R_1\) and \(R_2\) are placed in the same plane with their centres coinciding. If \(R_1>R_2\), the mutual inductance \(M\) between them will be directly proportional to

In metre-bridge experiment the balance point is obtained if the gaps are closed by \(2 \Omega\) and \(3 \Omega\). A shunt of \(x \Omega\) is added to \(3 \Omega\) resistor to shift the balance point by \(22.5 \text{ cm}\). The value of \(x\) is.

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

A charge $Q\mu\text{C}$ is placed at the centre of a cube. The flux through two opposite faces of the cube is ($\varepsilon_0 = $ permittivity of free space)}

In a single slit diffraction pattern, the distance between the plane of the slit and screen is 1.3 m . The width of the slit is 0.65 mm and the second maximum is formed at the distance of 2.6 mm from the centre of the screen. The wavelength of light used is

The two ends of a rod of length ' \( x \) ' and uniform cross-sectional area ' \( A \) ' are kept at temperatures ' \( T_1 \) ' and ' \( T_2 \) ' respectively (\( T_1>T_2 \)). If the rate of heat transfer is ' \( Q/t \) ', through the rod in steady state, then the coefficient of thermal conductivity ' \( K \) ' is

Photoelectric emission takes place from a certain metal at threshold frequency \( \nu \). If the radiation of frequency \( 4\nu \) is incident on the metal plate, the maximum velocity of the emitted photoelectrons will be (\( m = \) mass of photoelectron, \( h = \) Planck's constant)}

During thermodynamic process, the increase in internal energy of a system is equal to the work done on the system. Which process does the system undergo?

Two sound waves travelling in the same direction have displacement $y_1 = a \sin(0.2\pi x - 50\pi t)$ and $y_2 = a \sin(0.15\pi x - 46\pi t)$. How many times, a listener can hear sound of maximum intensity in one second?

Two stones of masses m and 3 m are whirled in horizontal circles, the heavier one in a radius $(\frac{r}{3})$ and lighter one in a radius r. The tangential speed of lighter stone is 'n' times the value of heavier stone. When the magnitude of centripetal force becomes equal the value of n is

A polyatomic gas at pressure P, having volume 'V' expands isothermally to a volume '3 V' and then adiabatically to a volume '24 V'. The final pressure of gas is (for moderate temperature changes)

In metre-bridge experiment the balance point is obtained if the gaps are closed by \(2 \Omega\) and \(3 \Omega\). A shunt of \(x \Omega\) is added to \(3 \Omega\) resistor to shift the balance point by \(22.5 \text{ cm}\). The value of \(x\) is.

A (2.5 V) battery is connected to a potentiometer wire. A cell of e.m.f. (1.08 V) is balanced by the voltage drop across (2.16 m) of wire. The length of the potentiometer wire is

A galvanometer of resistance ' G ' is converted into an ammeter of resistance \( \frac{G}{40} \), by connecting a shunt ' S ' to it. The part of main current passing through the galvanometer is