Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 53

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Assertion: If the electric field strength equals zero at a given point, the electric potential must be equal to zero for that point.

Reason: Electric field is the negative gradient of voltage or electric potential.

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Important Questions on Electric Charges and Fields

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 54

Assertion: Work done by electric force in a closed curve is zero.

Reason: Electric field is a conservative field.

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 55

The magnitude of electric field intensity E, such that an electron placed in it would experience an electrical force equal to its weight, is given by

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 56

In a region of uniform electric field of intensity

E

, an electron of mass

m_{e}

is released from rest. The distance travelled by the electron in time

t

is

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 57

A positively charged ball hangs from a silk thread. We put a positive test charge

q_{0}

at a point and measure

F / q_{0}

, then it can be predicted that the electric field strength

E

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 58

A physical quantity varies as

1 / r^{2}

, where

r

is the distance from the body. This physical quantity maybe

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 59

Some point charges are placed on the circumference of circle at equal distance (see figure). The direction of electric field at centre $O$ will be along
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 60

Three point charges, as shown, are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point of the hypotenuse?

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