Physics
(a) Which electrical component protects the electric circuit in case of excess current and which can also be used as a switch?
(b) Name the wire to which this electrical component is connected in an electric circuit.
Related Questions
A copper conductor is placed over two stretched copper wires whose ends are connected to a D.C. supply as shown in the diagram.
(a) What should be the magnetic poles at the points A and B lying on either side of the conductor to experience the force in the upward direction?
(b) Name the law used to find these polarities.
Thermal capacities of substances A and B are same. If mass of A is more than mass of B then:
(a) Which substance will have more specific heat capacity?
(b) Which substance will show greater rise in temperature if the same amount of heat is supplied to both?
(a) Is it possible for a concave lens to form an image of size two times that of the object? Write Yes or No.
(b) What will happen to the focal length of the lens if a part of the lens is covered with an opaque paper?
'A geyser is rated 240 W – 220 V'. Explain the meaning of this statement.