1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-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

A
104 A/m2
B
106 A/m2
C
10$$-$$5 A/m2
D
105 A/m2
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

A capacitor of capacitance C = 900 pF is charged fully by 100 V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance C = 900 pF as shown in figure (b). The electrostatic energy stored by the system (b) is

NEET 2022 Phase 1 Physics - Current Electricity Question 21 English

A
4.5 $$\times$$ 10$$-$$6 J
B
3.25 $$\times$$ 10$$-$$6 J
C
2.25 $$\times$$ 10$$-$$6 J
D
1.5 $$\times$$ 10$$-$$6 J
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-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 20 English

A
Should be approximately equal to 2X
B
Should be approximately equal and are small
C
Should be very large and unequal
D
Do not play any significant role
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A parallel plate capacitor has a uniform electric field $$\overrightarrow E $$ in the space between the plates. If the distance between the plates is 'd' and the area of each plate is 'A', the energy stored in the capacitor is : ($$\varepsilon $$0 = permittivity of free space)
A
$${{{E^2}Ad} \over {{\varepsilon _0}}}$$
B
$${1 \over 2}{\varepsilon _0}{E^2}$$
C
$${\varepsilon _0}EAd$$
D
$${1 \over 2}{\varepsilon _0}{E^2}Ad$$
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