1
NEET 2022 Phase 1
+4
-1

Two resistors of resistance, 100 $$\Omega$$ and 200 $$\Omega$$ are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in 100 $$\Omega$$ to that in 200 $$\Omega$$ in a given time is

A
1 : 2
B
2 : 1
C
1 : 4
D
4 : 1
2
NEET 2022 Phase 1
+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
3
NEET 2022 Phase 1
+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 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
4
NEET 2022 Phase 1
+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 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
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