Physics
Arrange α, β and γ-rays in ascending order with respect to their
(a) penetrating power
(b) ionising power
(c) biological effect
Related Questions
(a) What is a simple machine? State the principle of an ideal machine.
(b) A block and tackle pulley system has a velocity ratio 3. Draw a labelled diagram of this system. In your diagram, indicate clearly the points of application and the directions of the load and effort.
(a) A wave has a frequency of 800 MHz and a wave length of 30 cm. Calculate velocity.
(b) A radio can tune in to any station in 17.5 MHz to 13.5 MHz band, what is the corresponding wavelength band?
(a) A man standing between two cliffs produces a sound and hears two successive echoes at intervals of 2 s and 5 s respectively. Calculate the distance between the two cliffs. The speed of sounding in the air is 330 ms-1.
(b) Explain, why strings of different thicknesses are provided on a stringed instrument.
Shrey's room have two electric bulbs, these bulbs are connected in series and power supplied by 220 V.
(a) Calculate the total resistance of the circuit.
(b) Calculate the current in the circuit.
(c) Calculate the voltage drop across each bulb.