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Assertion (A): We use thick wire in the ...

Assertion (A): We use thick wire in the secondary coil of a step down transformer to reduce the production of heat.
Reason (R): If the plane of armature is parallel to the lines of force of magnetic field the magnitude of induced EMF is maximum.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true but (R) is not the correct explanation of (A).

C

(A) is true but (R) is false.

D

(A) is false and (R) is also false.

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EDUCART PUBLICATION-SAMPLE PAPER 9 -SECTION - B
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  2. The current passing through a choke coil of self-inductance 5 H is de...

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  3. The magnetic flux linked with the coil is given by phi = 5t^2 + 3t + ...

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  4. Find the new capacitance if two dielectric of dielectric constant 4 a...

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  5. Coulomb force (vecF(12)) in vector form is:

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  6. Where is the energy stored in a capacitor?

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  7. Five equal capacitors are connected in series and have net capacitanc...

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  8. The potential differences across the resistance, capacitance and induc...

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  9. Consider a simple circuit shown in Fig. stands for a variable resistan...

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  10. To rotate a bar magnet from. 0^@ to 120^@, the work done is:

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  11. The horizontal component of earth's magnetic field is 0.26 and vertica...

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  12. A rectangular loop ABCD' with movable arm AB of length 10 cm and resi...

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  13. A source of an alternating potential V = 200 sin (100 pit) V is conne...

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  14. Coefficient of coupling is given by:

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  15. For 2 hr, a television of 100 W is used. Find the units used:

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  16. Assertion (A): The dimension formula for product of conductance and r...

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  17. Assertion (A): 1 m wire is used to make meter bridge useful. Reaso...

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  18. Assertion (A): We use thick wire in the secondary coil of a step down...

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  19. Assertion (A): For phenomena of resonance both L·& Care to be present...

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  20. In a series LCR circuit, at resonant frequency.

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