NEET 2019 Exam Paper (Odisha) (180 Q) - Mock Test

Two identical capacitors $C_1$ and $C_2$ of equal capacitance are connected as shown in the circuit. Terminals $a$ and $b$ of the key $k$ are connected to charge capacitor $C_1$ using a battery of emf $V$ volt. Now disconnecting $a$ and $b$ terminals, terminals $b$ and $c$ are connected. Due to this, what will be the percentage loss of energy?

The main scale of a vernier calliper has $n$ divisions/cm. $n$ divisions of the vernier scale coincide with $(n-1)$ divisions of the main scale. The least count of the vernier calliper is:

A sphere encloses an electric dipole with charges $\pm 3\times 10^{-6}\text{C}$. What is the total electric flux through the sphere?

The work function of the photosensitive material is $4.0\text{eV}$. The longest wavelength of light that can cause photoelectric emission from the substance is (approximately):

A body of mass $m$ is kept on a rough horizontal surface (coefficient of friction = $\mu$). A horizontal force is applied to the body, but it does not move. The resultant of normal reaction and the frictional force acting on the object is given by $\vec{F}$ where: