alleryStart learning →Which rule gives the direction of the field around a long straight current wire?
ARight-hand grip rule
BLeft-hand palm rule
CLenz's law of flux
DKirchhoff's loop rule
Answer & Solution
Correct answer: A. Right-hand grip rule
Curling the right-hand fingers around the wire with the thumb along the current gives the field direction.
Keep practising Moving Charges and Magnetism
Browse all Moving Charges and Magnetism questions for Bihar Board Class 12 (Science), or explore more Physics topics.
Related questions
The approximate value of the earth's magnetic field is:The dimensional formula of magnetic field B is:A 50 ohm galvanometer has full-scale current 5 mA. What shunt makes it read 1 A?A galvanometer is converted into a voltmeter by adding a:Which change makes a galvanometer more sensitive to current?In the galvanometer relation, k stands for the:At equilibrium in a moving coil galvanometer, the deflection phi satisfies:A moving coil galvanometer works on the torque on a: