Question
Name two main sources of nuclear radiations. How are these radiations harmful?
✓
Answer
Two main sources of nuclear radiations are:
1.Radioactive fallout from nuclear plants and other sources.
2.Disposal of nuclear waste.
These radiations are harmful because when these radiations falls on the human body, they kill the human living tissues and cause radiation burns.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Calculate the equivalent resistance between A and B in the adjacent diagram.Calculate the equivalent resistance between A and B in the adjacent diagram.
Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
An imaginary material reflects red light, scatters green light, transmits blue light, and absorbs yellow, orange, and violet light. A cube of this material is shown in the given diagram.
The surface is illuminated with a beam of white light. What colour will this cube appear?
(i) from above,
(ii) from below and
(iii) from the sides?
The surface is illuminated with a beam of white light. What colour will this cube appear?
(i) from above,
(ii) from below and
(iii) from the sides?
Define watt-hour. How many joules are equal to 1 watt-hour?
State two advantages of ‘the ring system of house wiring’.
Write down the characteristic of the image formed when the object is between F and 2F?
A man fires a gun and hears its echo after 5 s. The man then moves 310 m towards the hill and fires his gun again. This time he hears the echo after 3 s. Calculate the speed of sound.
A 10 m long wire of a particular material is of reistance 5Ω What will be the resistance of 5m long wire of same material and the same thickness.
The figure shows a circuit. When the circuit is switched on, the ammeter reads $0.5 A.$
(i) Calculate the value of the unknown resistor $R.$
(ii) Calculate the charge passing through the $3 Ω$ resistor in $120 s.$
(iii) Calculate the power dissipated in the $3 Ω$ resistor.
→(i) Calculate the value of the unknown resistor $R.$
(ii) Calculate the charge passing through the $3 Ω$ resistor in $120 s.$
(iii) Calculate the power dissipated in the $3 Ω$ resistor.
Study the diagram alongside carefully and calculate the magnitude of resistance offered by resistor $x$.
→