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» CBSE Physics Magnetic Effects of Current Expected Questions for Quick Revision : Unit IV : CBSE Sample Question Papers

CBSE Physics Magnetic Effects of Current Expected Questions for Quick Revision : Unit IV

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(Derivation Type/Numerical Problems 3 Marks Each)

1. State factors upon which sensitivity of a moving coil galvanometer depend.
Answer

2. Calculate the value of the resistance needed to convert a galvanometer of resistance 100 Ω which gives a full scale deflection for a current of 5 mA into a voltmeter of 0-10 V range.
Answer

3. State Fleming’s left hand rule. What is the force on a charge moving along the directions of the magnetic field ?
Answer

4. Calculate the value of resistance needed to convert a galvanometer of resistance 200 Ω, which gives a full scale deflection for a current of 5 mA into a voltmeter of 0-25 V range.
Answer

5. Calculate the value of resistance needed to convert a galvanometer of resistance 120 Ω, which gives a full scale deflection for a current of 5 mA into voltmeter of range 0-50 V.
Answer

6. What is the effect of current flowing in the same direction in two long straight and parallel conductors ?
Answer

7. Give the definition of ampere in terms of force experienced by two parallel current carrying conductors.
Answer

8. Explain why two parallel straight metallic wires carrying current in opposite directions repel each other.
Answer

9. A galvanometer having a coil of resistance 100 Q gives full scale deflection when a current of 1 mA is passed throught it. Calculate the value of the resistance required to convert it into an ammeter of range 1 A.
Answer

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