What was India’s ranking in the World Happiness Report

Two capacitors of 6 µF and 3 µF are connected in series and a potential difference of 90 V is applied. The energy stored in the system is:

The time period of a second’s pendulum is –

Which conservation law is violated in nuclear beta decay if neutrinos are not considered?

The work done by a centripetal force on an object moving in a circular path is:

The functioning of a quartz crystal in a watch is based on which principle?

Which mirror always forms virtual, erect, and diminished image?

What type of rays are used in a CT scan to visualize the internal structures of the human body?

The focal length of a concave mirror is 20 cm. Where should an object be placed to get an image of the same size?

Which of the following is a characteristic of sound waves?