Current Electricity Test

Result

Current Electricity Test - 9

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

A battery is connected with a potentiometer wire. The internal resistance of the battery is negligible. If the length of the potentiometer wire of the same material and radius is doubled then

A
Potential gradient becomes two times

B
Potential gradient becomes half

C
Potential gradient does not change

D
None of these

Solution

Potential gradient is given by V/l. If V and l are constant, the potential gradient also remains constant. The change in the radius will cause a change in the current. This does not change the potential gradient.
Question 2
1 / -0

The Wheatstone bridge is balanced for four resistors R₁, R₂, R₃ and R₄ with a cell of emf 1.46 V. The cell is now replaced by another cell of emf 1.08 V. To obtain the balance again

A
Resistance R₄ should be changed only

B
Both the resistance R₁ and R₄ should be changed

C
No resistance needs to be changed

D
All the four resistance should be changed

Solution

The balance point of the Wheatstone’s bridge is determined by the ratio of the resistances. The change in the emf of the external battery will have no effect on the balance point.