Physics
(a) What is nuclear energy?
(b) After emission of a nuclear radiation, the atomic number of the daughter nucleus increases by 1. Identify the nuclear radiation.
(c) Write a nuclear reaction indicating the nuclear change mentioned in (b).
(d) What is the special name given to the parent and daughter nucleus when this radiation is emitted?
Related Questions
Rohit playing a flute and Anita playing a piano emit sounds of same pitch and loudness.
(a) Name one characteristic that is different for waves from the two different instruments.
(b) If now the loudness of the sound from flute becomes four times that of the sound from piano, then write the value of the ratio AF : AP (AF – amplitude of sound wave from flute, AP – amplitude of sound wave from piano)
(c) Define 'Pitch' of a sound.
(a) Name two factors on which the force experienced by a conductor carrying current, placed in a magnetic field, depends. Also, state how these factors affect the force.
(b) With the help of which rule you can determine the direction of force acting on a current carrying conductor placed in a magnetic field?
An appliance rated 440 W, 220V is connected across 220V supply.
(a) Calculate the maximum current that the appliance can draw.
(b) Calculate the resistance of the appliance.
The diagram below shows a vibrating tuning fork E mounted on a sound box X. When the vibrating tuning forks A, B, C and D are placed on the sound box Y one by one, it is observed that a louder sound is produced when the tuning fork B is place on Y.
(a) What is the frequency of tuning fork E?
(b) Why does B produce a louder sound?