List of top Physics Questions asked in MHT CET

The period of S. H.M. of a particle is 16 second. The phase difference between the positions at $\text{t} = 2\text{ s}$ and $\text{t} = 4\text{ s}$ will be}

A coil of self-inductance $L$ is connected in series with a bulb and an a. c. source. Brightness of the bulb decreases when

If $\vec{A} = \hat{i} + \hat{j} + 3\hat{k}$, $\vec{B} = -\hat{i} + \hat{j} + 4\hat{k}$ and $\vec{C} = 2\hat{i} - 2\hat{j} - 8\hat{k}$, then the angle between the vectors $\vec{P} = \vec{A} + \vec{B} + \vec{C}$ and $\vec{Q} = (\vec{A} \times \vec{B})$ is (in degree)}

In Young's double slit experiment, when light of wavelength $600\text{ nm}$ is used, 18 fringes are observed on the screen. If the wavelength of light is changed to $400\text{ nm}$ , the number of fringes observed on the screen is

For an ideal diode, in forward and reverse biased condition the resistance is respectively

In Young's double slit experiment, the distance between screen and aperture is $1\text{ m}$ . The slit width is $2\text{ mm}$ . Light of $6000\text{ \AA}$ is used. If a thin glass plate ( $\mu = 1.5$ ) of thickness $0.04\text{ mm}$ is placed over one of the slits, then there will be a lateral displacement of the fringes by}

For a particle moving in a circle with constant angular speed, which of the following statements is 'false'?

Light of wavelength ' $\lambda$ ' falls on a metal having work function $\frac{\text{hc}{\lambda_0}$. Photoelectric effect will take place only if ( $\lambda_0$ is the threshold wavelength)}

A student measures time for 20 oscillations of a simple pendulum as \(30\text{ s}, 32\text{ s}, 35\text{ s}\) and \(35\text{ s}\) . If the minimum division in the measuring clock is \(1\text{ s}\) , then correct mean time (in second) is

A wire has three different sections as shown in figure. The magnitude of the magnetic field produced at the centre '\(O\)' of the semicircle by three sections together is ( \(\mu_0 =\) permiability of free space)

In fundamental mode, the time required for the sound wave to reach up to closed end of a pipe filled with air is '\(t\)' second. The frequency of vibration of air column is (Neglect end correction)

For the following reaction, the particle ' x ' is \({}_6\text{C}^{11} \longrightarrow {}_5\text{B}^{11} + \beta^+ + \text{X}\)

When an observer moves towards a stationary source with velocity '\(V_1\)', the apparent frequency of emitted note is '\(F_1\)'. When observer moves away from stationary source with velocity '\(V_1\)' the apparent frequency is '\(F_2\)'. If '\(v\)' is velocity of sound in air and \(\frac{F_1}{F_2} = 2\), then \(\frac{v}{V_1}\) is equal to

Two discs A and B of same material and thickness have radii \(R\) and \(3R\) respectively. Their moments of inertia about their axis will be in the ratio

Which one of the following person is in an inertial frame of reference?

The potential difference \((V_A - V_B)\) between the points A and B in the given figure is

For a perfectly black body, coefficient of emission is

In hydrogen spectrum, the ratio of wavelengths of the last line of Lyman series and that of the last line of Balmer series is

The scale of a galvanometer is divided into 160 equal divisions. The galvanometer shows full scale deflection of \(16\text{ mA}\) and maximum voltage is \(80\text{ mV}\) . Now the range is changed so that galvanometer reads \(160\text{ V}\) . The required resistance to be connected is

In the case of constant ' \(\alpha\) ' and ' \(\beta\) ' of a transistor ( \(\alpha\) and \(\beta\) are current ratios)

The fundamental frequency of a closed pipe of length \(L\) is equal to the second overtone of a pipe open at both the ends of length (XL). The value of X is (Neglect end correction)

The instantaneous value of current in an a.c. circuit is \(I = 3 \sin (50\pi t + \frac{\pi}{4})\text{A}\). The current will be maximum for the first time at

‘P’ and ‘Q’ are fixed points in same plane and mass ‘m’ is tied by string as shown in figure. If the mass is displaced slightly out of this plane and released, it will oscillate with time period (\(PQ = 2d,\; PR = QR = L\))

In a photoelectric experiment, if the intensity of incident light is doubled and the frequency is kept slightly greater than threshold frequency, then the saturation photoelectric current

An electric dipole of dipole moment ' \(p\) ' is aligned parallel to a uniform electric field ' E '. The energy required to rotate the dipole by \(90^\circ\) is \( \begin{bmatrix} \sin 0^\circ = 0, & \sin 90^\circ = 1 \\ \cos 0^\circ = 1, & \cos 90^\circ = 0 \end{bmatrix} \)