Question
Copy the diagram given below and complete the path of the light ray PQ
Copy the diagram given below and complete the path of the light ray PQ, as it emerges out of the prism by…
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Question
The diagram below shows the ray OP travelling through an equilateral prism of a certain material
The diagram below shows the ray OP travelling through an equilateral prism of a certain material. (a) Calculate the value of i2,…
Question
How is the radioactivity of a radio isotope affected if it undergoes a chemical change
How is the radioactivity of a radio isotope affected if it undergoes a chemical change? Give a reason for your answer.
Question
Thermal capacities of substances A and B are same
Thermal capacities of substances A and B are same. If mass of A is more than mass of B then: (a) Which…
Question
A copper conductor is placed over two stretched copper wires
A copper conductor is placed over two stretched copper wires whose ends are connected to a D.C. supply as shown in the…
Question
Which electrical component protects the circuit in case of excess current
(a) Which electrical component protects the electric circuit in case of excess current and which can also be used as a switch?…
Question
Is it possible for a concave lens to form an image twice the size of the object
(a) Is it possible for a concave lens to form an image of size two times that of the object? Write Yes…
Question
A geyser is rated 240 W – 220 V
‘A geyser is rated 240 W – 220 V’. Explain the meaning of this statement.
Question
A metal foot ruler is held at the edge of a table
A metal foot ruler is held at the edge of a table. It is pressed at its free end and then released.…
Question
Calculate the power spent by a crane while lifting a load
Calculate the power spent by a crane while lifting a load of mass 2000 kg, at velocity of 1.5 m s−1. (g…