List of practice Questions

The hard ferromagnetic material among the following is
In Cyclotron, the frequency of revolution ofthe charged particle in a magnetic field is independent of
A current carrying coil placed in a magnetic field B experiences a torque τ. If θ is the angle between the normal to the plane of the coil and field B and φ is the flux linked with the coil, then
A conductor of length 20 cm carrying a curent of 5A is placed at an angle of 30° to the extemal magnetic field of 0.5 T. The.force acting on it is
A Wheatstone network is balanced with respective resisto$ 5Ω. l0Ω. 20 Ω and 40 Ω in tbe P. 0. R and S arms. If a 40 Ω) resisror is connecred across S arm. Then the bridge is again balanced by connecting
The magnitude of tfie drift velocity per unit electric field is defined as
The ratio of the magnitudes of electrostatic force between two protons at a distarce r apart to that between two electrons at the same distance of separation is
An air capacitor and identical capacitor filled with dielectric medium of dielectric constant 5 are connected in series to a voltage source of 12V. The fall of potential across $C_1$ and $C_2$ are respectively
The electric potential at a point at a distance r due to an eclectic dipole is proportional to
When two sound waves of slightly different ftequencies $f_1$ and $f_2$ are sounded together, then the time interval between successive maxima is
The hydrocarbons containing —CONH2 functional group are called CONH)
In hydrocarbons, which type of bonds does carbon form?
For hydrocarbons, if the molecular formula increases, then melting point
Hydrocarbons that contain only single bonds between the carbon atoms are called
The ability of an element to form the longest chain with its own atoms is called as
Which of the following methods is used to prevent corrosion?
Which of the following minerals contains manganese?
The spot at which corrosion occurs on the surface of an iron material, behaves as
The impurities such as soil and sand associated with ore are called
In nature, gold metal is available in free state(native), because
Triple bond between nitrogen atoms in N2 molecule contains
If the valency of sodium is 1 and oxygen is 2, then the formula of compound formed between sodium and oxygen is
When a metal atom forms ionic bond with a non-metal atom, the metal atom will
Which of the following is a noble gas ?
lonic bond is formed due to which of the following?