BITSAT 2019 Electrostatics & Magnetism Revision Quiz 1

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Question 1

What will be the change in energy stored in the 80μF condenser, when it is charged from 0.1 to 0.9?

• A2000 J
• B5000 J
• C2500 J
• D1000 J

Question 2

An infinite number of equal and opposite charges are placed along x axis at then the net electric potential at x= 0 is given by
Assume

• A
• B
• C
• D

Question 3

An α-particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities. Find the ratio of the radii of their circular paths.

• A4 : 1
• B1 : 4
• C2 : 1
• D1 : 2

Question 4

Two parallel wires carrying currents l₁and l₂ in opposite directions and separated by a distance d experience a

• Arepulsive force
• Battractive force
• Cattractive force
• Dattractive force

Question 5

Five capacitors are connected to each other as shown below. What is the potential drop and charge across 4μF capacitor

• A6V, 30 μC
• B10V, 30 μC
• C6V, 40 μC
• D10V, 40 μC

Question 6

A charge is distributed over two concentric hollow conducting spheres such that the surface densities are equal. What will be the potential at the common centre, if the radii of spheres be and respectively?

• A
• B
• C
• D

Question 7

A galvanometer with a scale divided into 100 equal divisions has a current sensitivity of 10 divisions per miliampere and a voltage sensitivity of 2 divisions per milivolt. The galvanometer resistance will be

• A4 Ω
• B5 Ω
• C3 Ω
• D7 Ω

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