NEET (UG) entrance exam Question Bank Solutions for Physics

An astronaut inside a satellite is in a state of weightlessness because of the effect of

A Carnot engine takes 300 calories of heat from a source at 500 K and rejects 150 calories of heat to the sink. The temperature of the sink is ______. 

A system consisting of two masses connected by a massless rod lie along the x-axis. A 0.4 kg mass is at a distance x = 2m while a 0.6 kg mass is at a distance x = 7 m. The x-coordinate of the centre of mass is:

The Wheatstone bridge is in a more balanced state when the ratio of arms P and Q is ______

Carnot engine cannot give 100% efficiency, because we cannot ______.

The centre of mass of a body ______.

A ray of light is incident at an angle of 45° on one face of a rectangular glass slab of thickness 10 cm and refractive index 3/2. Calculate the lateral shift produced ______.

A radioactive nucleus \[\ce{^A_ZX}\] undergoes spontaneous decay in the sequence \[\ce{^A_ZX -> _{Z-1 }B -> _{Z-3}C -> _{Z-2}D }\], where Z is the atomic number of element X. The possible decay particles in the sequence are ______.

An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance ‘R’ are connected in series to an ac source of potential difference ‘V’ volts as shown in the figure.

The potential difference across L, C, and R is 40 V, 10 V and 40 V, respectively. The amplitude of the current flowing through the LCR series circuit is `10sqrt2 "A"`. The impedance of the circuit is:

The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.

The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.

In rotational motion of a rigid body, all particles move with

When one electron is taken towards the other electron, then the electric potential energy of the system ______

The coil of galvanometer consists of 100 turns and effective area of 1 square cm. The restoring couple is 10^-8 N-m/rad. The magnetic field between the pole pieces is 5T. The current sensitivity of this galvanometer will be ______.

An alternating current of 1.5 mA and angular frequency 300 rad/sec flows through a 10 k Ω resistor and a 0.50 µF capacitor in series. Find the rms voltage across the capacitor and impedance of the circuit.

The metre bridge works on the principle of ______

Which of the following is most suitable for the core of an electromagnet?

In a meter bridge experiment, resistance are connected as shown in figure, The balancing length 1, is 55 cm. Now an unknown resistance x is connected in series with P and new balancing length is found to be 75cm. The value of x is ______.

Newton's law of cooling leads to the expression: 

The instrument among the following which measures the e.m.f of a cell most accurately is ______