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Class 10 Magnetic effects of current - Practice Worksheet




One marks questions

Question 1 How can you show that the magnetic field produced by a given electric current in the wire decreases as the distance from the wire increases?

Question 2 What is the advantage of the third wire of earth connection in domestic appliances?

Question 3 How is the strength of the magnetic field at a point near a wire related to the strength of the electric current flowing in the wire?

Question 4 On what effect of an electric current does an electromagnet work?

Two marks questions

Question 5. With the help of a neat-diagram, describe how you can generate induced current in a circuit.
Question 6 Explain terms: (a) overloading and (b) short-circuiting

Question 7 List in tabular form two major differences between electric motor and electric generator.

Question 8 Explain the function of earth wire. Why is it necessary to earth metallic appliances?
Question 9 All household appliances are connected in parallel. List two advantages of this type of arrangement.


Three marks questions

Question 10 Explain briefly two different ways to induce current in a coil. State the rule which determines direction of induced current.
Question 11 (a) A stationary charge is placed in a magnetic field. Will it experience force? Give reason and justify your answer.
(b) On what factors does the direction of force experienced by a current carrying conductor when placed in a magnetic field depends?
(c)  Under what conditions is the force experienced by a current carrying conductor placed in a uniform magnetic field is maximum.

Question 12 List four important features of domestic electric circuit. Draw a diagram of common domestic circuit showing live, neutral and earth wires.

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Practice Question

Question 1 Which among the following is not a base?
A) NaOH
B) $NH_4OH$
C) $C_2H_5OH$
D) KOH
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene


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