Magnetism Question 263
Question: A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled, the deflection will
Options:
A) increase
B) decrease
C) remain same
D) any of these
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ i=( \frac{2RB _{H}}{{\mu _{0}}N} ),\tan ,\theta $ or $ \frac{V}{R}=( \frac{2RB _{H}}{{\mu _{0}}N} ),\tan \theta $ ?? (i) When number of turns are doubled, resistance of the coil is also doubled, so $ \frac{V}{(2R)}=[ \frac{2RB _{H}}{{\mu _{0}}(2N)} ]\tan ,{{\theta }^{’}} $ ?? (ii) From (i) and (ii), $ {{\theta }^{’}}=\theta $ .
BETA
