1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagnetic wave is : (c = speed of electromagnetic waves)
A
1 : 1
B
1 : c
C
1 : c2
D
c : 1
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is : (g = 10 m/s2)
A
340 m
B
320 m
C
300 m
D
360 m
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :
$$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}Tm{{A}^{-1}}} \right)$$
A
3.14 $${ \times {{10}^{ - 4}}T}$$
B
6.28 $${ \times {{10}^{ - 5}}T}$$
C
3.14 $${ \times {{10}^{ - 5}}T}$$
D
6.28 $${ \times {{10}^{ - 4}}T}$$
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Taking into account of the significant figures, what is the value of $$9.99 m - 0.0099m$$?
A
9.98 m
B
9.980 m
C
9.9 m
D
9.9801 m
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