Radiation and Dual Nature of Matter — Physics STD 12 Science — Question

Suppose the platform of the previous problem is brought to rest with the ball in the hand of the kid standing on the rim. The kid throws the ball horizontally to his friend in a direction tangential to the rim with a speed v as seen by his friend. Find the angular velocity with which the platform will start rotating.

Define electric field strength. Is it a vector or a scalar quantity?

Draw a graph between photoelectric current and anode potential for two light beams of different intensity and same wavelength.

If the nucleons of a nucleus are separated far apart from each other, the sum of masses of all these nucleons is larger than the mass of the nucleus. Where does this mass difference come from?

Find the fundamental, first overtone and second overtone frequencies of an open organ pipe of length 20cm. Speed of sound in air is 340m/s.

Germanium and silicon junction diodes are connected in parallel. A resistance R, a 12V battery, a milliammeter (mA) and key (K) are connected in series with them (figure). When key (K) is closed, a current begins to flow in the milliammeter. What will be the maximum reading of voltmeter connected across resistance R?

State conditions when resultant magnetic field at a point due to two long straight perpendicular current carrying wires can be zero.

How does a charge q oscillating at certain frequency produce electromagnetic waves?Sketch a schematic diagram depicting electric and magnetic fields for an electromagnetic wave propagating along the Z-direction.