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

An electric lift with a maximum load of 2000 kg (lift + passengers) is moving up with a constant speed of 1.5 ms$$-$$1. The frictional force opposing the motion is 3000 N. The minimum power delivered by the motor to the lift in watts is : (g = 10 ms$$-$$2)

A
23000
B
20000
C
34500
D
23500
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

The angle between the electric lines of force and the equipotential surface is

A
0$$^\circ$$
B
45$$^\circ$$
C
90$$^\circ$$
D
180$$^\circ$$
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

When two monochromatic lights of frequency, v and $${v \over 2}$$ are incident on a photoelectric metal, their stopping potential becomes $${{{V_s}} \over 2}$$ and Vs respectively. The threshold frequency for this metal is

A
2v
B
3v
C
$${2 \over 3}$$v
D
$${3 \over 2}$$v
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language

A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is

A
6.28 $$\times$$ 10$$-$$2 T
B
12.56 $$\times$$ 10$$-$$2 T
C
12.56 $$\times$$ 10$$-$$4 T
D
6.28 $$\times$$ 10$$-$$4 T
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