- (A) τ = NIAB cosφ
- (B) τ = NIAB sinφ
- (C) τ = NIAB tanφ
- (D) τ = NIAB
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- (A) charge in motion
- (B) charge at rest
- (C) both
- (D) none
- (A) R=qB/mV
- (B) R=mV/qB
- (C) R=qmV/B
- (D) R=qmB/V
- (A) F=1/B
- (B) F=1/Bsinθ
- (C) F/0
- (D) F=1/Bcosθ
- (A) be rotating
- (B) come to rest in N-S direction
- (C) vibrating like galvanometer needle
- (D) comes to rest after rotation
- (A) independent mass m
- (B) directly proportional to m
- (C) directly proportional to q
- (D) directly proportional to B
- (A) maximum current flows through the galvanometer branch
- (B) minimum current flows through the galvanometer branch
- (C) potential difference across galvanometer branch is maximum
- (D) potential difference across galvanometer branch is zero
- (A) weaken it
- (B) strengthen it
- (C) reverse its polarity
- (D) demagnetize it completely
- (A) very low damping
- (B) very high damping
- (C) no damping at all
- (D) radial field disintegration
- (A) a straight line parallel to the field
- (B) a parabola in a plane perpendicular to the field
- (C) a circle in a plane perpendicular to the field
- (D) a straight line along its initial direction
