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Physics MCQ - Magnetic Effects Of Current

31 A uniform magnetic field exist in the plane of paper pointing from bottom to top while a proton and an electron are moving from left to right as shown in figure. The force experienced by them will be

(NTSE Haryana, Stage-I, 2015-16)

32 The strength of a magnetic field of magnet increases when (NTSE Chhattisgarh, Stage-I, 2016-17)

33 The two ends of a horizontal conducting rod of length l are joined to a voltmeter. The whole arrangement moves with a horizontal velocity v, the direction of motion being perpendicular to the rod. The vertical component of earth's magnetic field is B. The voltmeter reading is (NTSE Andhra Pradesh, Stage-I, 2016-17)

34 M.R.I. is based on (NTSE Maharashtra, Stage-I, 2016-17)

35 Choose the correct alternative, in relation to properties of magnetic lines of force. (NTSE Maharashtra, Stage-I, 2015-16)

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Question:

On which of the following does not exert any force when kept in uniform magnetic field? (NTSE Chhattisgarh, Stage-I, 2015-16)

A. Moving magnet
B. Moving charge
C. Stationary magnet
D. Stationary charge

Correct answer: D

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