An electric field due to a positive charge is represented by the diagram. Which of the following points has higher potential?

• A

• B

• C

• D

Maximum power is delivered by battery to a load resistance R when

• R = r

• R > r

• R < r

Tags

NGSS.HS-PS2-4

The magnitude of electric field strength E such that an electron placed in it would

experience an electrical force equal to its weight is given by

• mg

• mg/e²

•  mg/e

•  e/mg

Tags

NGSS.HS-PS2-1

The least resistance that one can have from six resistors of each 0.1 ohm resistance is

• 0.167 Ω

• 0.0167 Ω

• 1.67 Ω

• 16.7 Ω

When three identical resistances are connected to form a triangle the resultant resistance between any two corners is 30Ω .The value of each resistance is

• 90Ω

• 45Ω

• 30Ω

• 15Ω

The capacity of a storage cell is 5 ampere hours. The maximum current it can supply for ten hours is

• 5 ampere

• 50 ampere

• 0.5 ampere

• 0.25 ampere

On moving a charge of 20 C by 2 cm, 2 J of work is done, then the potential difference between the points is

• 0.1V

• 8 V

• 2 V

• 0.2V

Two equal and opposite 5C charges are separated by a distance 10 cm. The electric potential at the midway between them is

• High

• Low

• Constant

• Zero

In comparison with the electrostatic force between two electrons, the electrostatic force between two protons at the same distance is.

• Zero

• Smaller

• Same

• Greater

Tags

NGSS.HS-PS2-4