GATE PH 2022 Paper 1 — page 18

Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.

In a Hall effect experiment on an intrinsic semiconductor, which of the following statements are correct?

Your answerSelect all correct options. You can choose more than one.

Hall voltage is always zero

Hall voltage is negative if the effective mass of holes is larger than those of electrons

Hall coefficient can be used to estimate the carrier concentration in the semiconductor

Hall voltage depends on the mobility of the carriers

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A parallel plate capacitor with spacing

and area of cross-section

is connected to a source of voltage

. If the plates are pulled apart quasistatically to a spacing of

, then which of the following statements are correct?

Your answerSelect all correct options. You can choose more than one.

The force between the plates at spacing

The work done in moving the plates is

The energy transferred to the voltage source is

The energy of the capacitor reduces by

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A system with time independent Hamiltonian

has two constants of motion

and

. Then which of the following Poisson brackets are always zero?

Your answerSelect all correct options. You can choose more than one.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

2022 · Paper 1