MEDIUM
JEE Main
IMPORTANT
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A glass rod rubbed with silk is brought close to two uncharged metallic spheres in contact with each other, inducing charges on them as shown in the figure. Discuss what happens when the glass rod is removed and the spheres are separated apart.

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Important Questions on Coulomb's Laws and Electric Field

EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 2
A positively charged insulator is brought near (but does not touch) two metallic spheres that are in contact. The metallic spheres are then separated. The sphere which was initially farthest from the insulator will have
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 3
Five balls numbered 1 to 5 are suspended using separate threads. Pairs (1, 2), (2, 4) and (4, 1) show electrostatic attraction, while pair (2, 3) and (4, 5) show repulsion. Therefore ball 1 must be
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 4
There are two metallic spheres of same radii, but one is solid, and the other is hollow, then
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 5
When an isolated body is connected with Earth, electrons from the Earth flow into the body. This means the body was
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 6
A positively charged rod is brought near to a non-conducting object. The rod is attracted to the object. From this observation, we can't predict whether the object is charged or uncharged. Some additional experiments have been performed to identify whether the object is charged or uncharged. These experiments, with their observations and conclusions drawn are given. Select the option in which the conclusion drawn is correct.
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 7
A point charge +q is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 8

In two cases, two identical conducting spheres are given equal charges, in one case of the same type whereas in another case of the opposite type. The distance between the spheres is not large as compared with the diameter. Let F1 and F2 be the magnitude of the force of interaction between the spheres, as shown, then

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MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 1 - Coulomb's Laws and Electric Field>DPP>Q 9

The diagram shows the arrangement of three small uniformly charged spheres A, B and C. The arrows indicate the direction of the electrostatic forces acting between the spheres (for example, the left arrow on sphere A indicates the electrostatic force on sphere A due to sphere B). At least two of the spheres are positively charged. Which sphere, if any, could be negatively charged?

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