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Question 1 of 5
1. Question
4 pointsAn electron is moving in a circular path under the influence of a transverse magnetic field of 3.57 × 10–2 T. If the value of e/m is 1.76 × 1011 C/kg, the frequency of revolution of the electron is [NEET 2016]
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Question 2 of 5
2. Question
4 pointsA long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be [NEET 2016]
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Question 3 of 5
3. Question
4 pointsA galvanometer having a coil resistance of 100 Ω gives a full scale deflection, when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10 A, is [JEE Main 2016]
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Question 4 of 5
4. Question
4 pointsA galvanometer of resistance 30Ω is connected to a battery of emf 2V with 1970Ω resistance in series. A full scale deflection of 20 divisions is obtained in the galvanometer. To reduce the deflection to 10 divisions, the resistance in series required is [MHT CET 2016]
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Question 5 of 5
5. Question
4 pointsIn the cyclotron, as radius of the circular path of the charged particle increases (ω = angular velocity, v = linear velocity) [Karnataka CET 2016]
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