An object is placed at 20 cm from a convex mirror of focal length 10 cm. The image formed by the mirror is _____________.

The momentum for a wavelength of 0.01 Å is _________

In an electron microscope, the electron beam is associated through a large potential difference in a device called _______

If the distance between the conduction band and valence band is leV, then this combination is _______________.

If the kinetic energy of photo electron is found to be 16 J, whose mass is m_e, the maximum velocity of that electron will be _____________.

Audio signal cannot be transmitted because _______________.

Electron microscope works on the principle of ________________.

Two photons each of energy 2.5 eV are simultaneously incident on the metal surface. If the work function of the metal is 4.5 eV then from the surface of the metal ______________.

For hydrogen atom, the energy of the n^th orbit is given by, En = __________________.

The output transducer of the communication system converts the radio signal into ________.

In J.J. Thomson e/m experiment, electrons are accelerated through 2.6 kV enter the region of crossed electric field and magnetic field of strength 3.0 x 10⁴ Vm^-1 and 1.0 x 10^-3 T, respectively, and pass through it and undeflected, then the specific charge is _____.

When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as plane sheet of glass. This implies that the liquid must have refractive index, ______.

Carbon are produces ________ spectrum.

The orbital magnetic moment of an electron in the second orbit (n = 2) is _______________.

If the temperature of hot junction is increased beyond inversion temperature the thermo emf ______________.

The quantity that changes with time in an A.C current is ________________.

Kirchhoff's law is applicable only for__________

The equivalent resistance between A and B in the figure is

The force between like charges is _________.

The time taken by a conductor to reach electrostatic equilibrium is in the order of

Two short bar magnets have magnetic moments 1.20 Am² and 1.00 Am² respectively. They are kept on a horizontal table parallel to each other with their north poles pointing towards south. They have a common magnetic equator and are separated by a distance of 20.0 cm. The value of the resultant horizontal magnetic induction at the mid-point O of the line joining their centres is (Horizontal components of Earth’s magnetic induction is 3.6 × 10^–5 Wb m^–2 )

A wire of length l carrying a current I along the Y direction is kept in a magnetic field is given by \(\vec { B } =\frac { \beta }{ \sqrt { 3 } } =(\hat { i } +\hat { j } +\hat { k } )T.\) The magnitude of Lorentz force acting on the wire is _____.

During the propagation of electromagnetic waves in a medium __________________.

Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is _______.

A carbon resistor of (47 ± 4.7 ) k Ω to be marked with rings of different colours for its identification. The colour code sequence will be ______.