NEET (UG) entrance exam Question Bank Solutions

A series LCR circuit containing a 5.0 H inductor, 80 µF capacitors, and 40 Ω resistor is connected to a 230 V variable frequency ac source. The angular frequencies of the source at which power is transferred to the circuit are half the power at the resonant angular frequency are likely to be ______.

A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room  temperature same at 20°C is ______.

A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool from 80°C to 60°C at a room  temperature same at 20°C is ______.

A series LCR circuit containing 5.0 H inductor, 80 µF capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be ______.

According to new Cartesian sign conventions, all the distances are measured from the ______.

In an oscillating system, a restoring force is a must. In an LC circuit restoring force is provided by ______.

When a charged condenser is allowed to discharge through the inductor the electrical oscillations are produced called ______

In a series LCR circuit, the net reactance at resonance should be ______

Q-factor can be increased by having a coil of ______.

A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since ______.

The number of nuclei undergoing the decay per unit time is

If half life of a radioactive element is 3 hours after 27 hours it activity becomes ______.

A radioactive nucleus can decay by two different processes. The half-life for the first process is t₁ and that for the second process is t₂ then what will be the effective half-life t of the nucleus is ______.

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 ______

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 ______.

Which of the following are suitable for the fusion process?

A concave and convex lens have the same focal length of 20 cm and are placed in contact to form a lens combination. The combination is used to view an object of 5 cm length kept at 20 cm from the lens combination. As compared to the object, the image will be

In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain drop after ______.

During dispersion of white light by prism placed in air, for a particular value of angle of prism,

The sky would appear red instead of blue if