NEET 2022 Phase 1 | Current Electricity Question 21 | Physics

NEET 2022 Phase 1

MCQ (Single Correct Answer)

-1

A copper wire of length 10 m and radius $$\left( {{{{{10}^{ - 2}}} \over {\sqrt \pi }}} \right)$$ m has electrical resistance of 10 $$\Omega$$. The current density in the wire for an electric field strength of 10 (V/m) is

10⁴ A/m²

10⁶ A/m²

10^$$-$$5 A/m²

10⁵ A/m²

NEET 2022 Phase 1

MCQ (Single Correct Answer)

-1

A wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistance P and Q

NEET 2022 Phase 1 Physics - Current Electricity Question 22 English

Should be approximately equal to 2X

Should be approximately equal and are small

Should be very large and unequal

Do not play any significant role

NEET 2021

MCQ (Single Correct Answer)

-1

In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?

62 cm

60 cm

21.6 cm

64 cm

NEET 2021

MCQ (Single Correct Answer)

-1

The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is 0.25$$\Omega$$. What will be the effective resistance if they are connected in series?

4$$\Omega$$

0.25$$\Omega$$

0.5$$\Omega$$

1$$\Omega$$

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