Physics Test 12

Result

Physics Test 12

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Weekly Quiz Competition

Question 1
4 / -1

For the higher sensitivity which of the following is essential for the potentiometer ?

A
Large length of the wire

B
Higher resistivity of the wire

C
Higher emf of auxiliary battery

D
None of the above

Solution

For higher sensitivity of potentiometer, the value of gradient along the potentiometer wire should be small which is possible by increasing length of potentiometer wire.
Question 2
4 / -1

The forbidden energy band gap in conductors, semiconductors and insulators are EG₁, EG₂ and EG₃ respectively. The relation among them is

A
EG₁= EG₂ = EG₃

B
EG₁< EG₂ < EG₃

C
EG₁> EG₂ > EG₃

D
EG₁< EG₂ > EG₃

Solution

In insulators, the forbidden energy gap is very large, in case of semiconductor it is moderate and in conductors the energy gap is zero.