Question

Whenever a magnet is moved either towards or away from a conducting coil, magnetic flux linked with the coil changes. This change is dependent on
(a) the strength of the magnetic field.
(b) the area of cross-section of the coil.
(c) the resistance of the coil.
(d) the number of turns in the coil.

• A. (a), (b), (c)
• B. (a), (c), (d)
• C. (a), (b), (d)
• D. (b), (c), (d)

Hint:

Flux linkage depends on field strength, area and number of turns. The coil resistance does not enter.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Flux linked with a coil is \(N\phi=NBA\cos\theta\).

Step 2: Check Each Factor
(a) The field strength \(B\) is in the formula.
(b) The area \(A\) is in the formula.
(d) The number of turns \(N\) multiplies the flux linkage.
(c) The resistance only affects the induced current, not the flux.

Step 3: Compare the options
The factors (a), (b) and (d) match the third option.

Final Answer:
The flux depends on the field strength, the area and the number of turns. \[ \boxed{\text{(C) }\text{(a), (b), (d)}} \]