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Assertion : Work done by magnetic field on a moving charge is zero.
Reason : Force experienced by a moving charge in a magnetic field is may be zero. 

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Important Questions on Magnetic Effect of Current

MEDIUM
NEET
IMPORTANT
Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 177
Assertion : The direction of magnetic moment and orbital angular momentum are opposite to each other for electron. 
Reason : Electron is negatively charged. 
EASY
NEET
IMPORTANT
Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 178
Assertion : The direction of magnetic moment and orbital angular momentum are opposite to each other for electron.
Reason : Electron is negatively charged.
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NEET
IMPORTANT
Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 179
Assertion : In external magnetic field, kinetic energy of charge particle remains constant.
Reason : In external magnetic field velocity of charge remains constant. 
EASY
NEET
IMPORTANT
Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 180
Assertion : Unlike charges are projected in opposite direction in transverse magnetic field, then they are deflected in same directions. 
Reason : If a voltmeter connected across two peripheral points of faraday copper disc generator, its reading is zero.