CUET (UG) entrance exam Question Bank Solutions for Physics

The resonant frequency of a RF oscillator is 1 MHz and its bandwidth is 10 kHz. The quality factor will be :

To reduce the resonant frequency in an LCR series circuit with a generator

Five cells each of emf E and internal resistance r send the same amount of current through an external resistance R whether the cells are connected in parallel or in series. Then the ratio `("R"/"r")` is:

In series LCR AC-circuit, the phase angle between current and voltage is

The phase diffⁿ b/w the current and voltage at resonance is

In an LCR circuit having L = 8 henery. C = 0.5 µF and R = 100 ohm in series, the resonance frequency in radian/sec is

The current sensitivity of a galvanometer increase by 20%. If its resistance also increases by 25%, the voltage sensitivity will ______.

A galvanometer of resistance 100 Ω gives a full-scale deflection for a current of 10⁻⁵ A. To convert it into an ammeter capable of measuring up to 1 A we should connect a resistance of ______.

A galvanometer having a coil resistance of 60 Ω shows full-scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents up to 5.0 amp by:

In the circuit in figure the potential difference across P and Q will be nearest to

In an ammeter 0.5% of main current passes through galvanometer; If resistance of galvanometer is G, the resistance of ammeter will be.

Two sources of equal e.m.f are connected to an external resistance R in series. The internal resistance of the two sources are R₁ and R₂ (R₂ > R₁) If the potential difference across the source having internal. resistance R₂ is zero, then ______.

A square loop and a circular loop are formed from the same wire and the same current is passed through them. The ratio of their dipole moments is ______.

Two metal wires of identical dimensions are connected in parallel. If σ₁ and σ₂ are the conductivities of the metal wires respectively, the effective conductivity of the combination is

The force 'F' acting on a particle of mass 'm' is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8s is:

While measuring the length of the rod by vernier callipers, the reading on the main scale is 6.4 cm and the eight divisions on vernier is in line with marking on the main scale division. If the least count of callipers is 0.01 and zero error - 0.04 cm, the length of the rod is ______.

In a certain region of space, the electric field is zero. From this fact, what can you conclude about the electric potential in this region?

The orbital speed of an electron orbiting around a nucleus in a circular orbit of radius 50 pm is 2.2 × 10⁶ ms⁻¹. Then the magnetic dipole moment of an electron is:

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 × 10^-15m is 

Two cell of 1.25 V and 0.75 V are connected parallel. The effective voltage will be:-