Q.1.Name the type of current. (a) used in household supply (b) given in cell
Q.2. Name the physical quantities of electromagnetic induction.
Q.3. Give one application of electromagnetic induction.
Q.4. Name any two appliances which are based on the application of heating effect of electric current.
Q.5. What constitutes the field of a magnet?
Q.6. A compass needle is placed near a current carrying wire. State your observation for the following cases, and give reason for the same in each case.
a. Magnitude of electric current in the wire is increased
b. The compass needle is displayed away from the wire
Q.7. Explain the role of fuse in series with any electrical appliance in an electric circuit. Why should a fuse with defined rating for an electric circuit not be replaced by one with a larger ratings?
Q.8. What is meant by the term frequency of an alternating current? What is the value in India? Why is an alternating current considered to be advantageous over direct current for long range transmission of electric energy?
Q.9. What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into electromagnet.
Q.10. With the help of neat diagram describe how you can generate induced current in the circuit.
Q.11. a. Mention effect of electric current on which the working of an electrical fuse is based.
b. Draw a schematic labeled diagram of a domestic circuit which has a provision of a main base, meter, one light bulb and a socket.
c. Explain the term overloading of an electric circuit.
Q.12. a. Describe an activity to demonstrate the pattern of magnetic field lines around a straight conductor carrying current.
b. State the rule to find the direction of magnetic field associated with a current carrying conductor?
c. What is the shape of a current carrying conductor whose magnetic field pattern
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Explanation:
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Name the physical quantities of electromagnetic induction
magnetic flux.
cross section area.
Direction of current.
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