Moving Charges and Magnetism - Result Question 73
74. A straight wire of length 0.5 metre and carrying a current of 1.2 ampere is placed in uniform magnetic field of induction 2 tesla. The magnetic field is perpendicular to the length of the wire. The force on the wire is
[1992]
Topic 4: Galvanometer and Its Conversion
into Ammeter & Voltmeter75. Current sensitivity of a moving coil galvanometer is $5 div / mA$ and its voltage sensitivity (angular deflection per unit voltage applied) is $20 div / V$. The resistance of the galvanometer is
(a) $40 \Omega$
(b) $25 \Omega$
(c) $500 \Omega$
(d) $250 \Omega$
[2018]
Show Answer
Answer:
Correct Answer: 74. (b)
Solution:
- (b) $F=Bi \ell=2 \times 1.2 \times 0.5=1.2 N$
