1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
A moving coil galvanometer has resistance 50$$\Omega $$ and it indicates full deflection at 4mA current. A voltmeter is made using this galvanometer and a 5 k$$\Omega $$ resistance. The maximum voltage, that can be measured using this voltmeter, will be close to :
A
15 V
B
10 V
C
40 V
D
20 V
2
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The electric field of light wave is given as $$$\overrightarrow E = {10^{ - 3}}\cos \left( {{{2\pi x} \over {5 \times {{10}^{ - 7}}}} - 2\pi \times 6 \times {{10}^{14}}t} \right)\mathop x\limits^ \wedge {{\rm N} \over C}$$$ This light falls on a metal plate of work function 2eV. The stopping potential of the photoelectrons is :
Given, E (in eV) = 12375/$$\lambda $$(inÅ)
A
2.48 V
B
0.48 V
C
0.72 V
D
2.0 V
3
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
A ball is thrown vertically up (taken as +z-axis) from the ground. The correct momentum-height (p-h) diagram is :
A
JEE Main 2019 (Online) 9th April Morning Slot Physics - Center of Mass and Collision Question 79 English Option 1
B
JEE Main 2019 (Online) 9th April Morning Slot Physics - Center of Mass and Collision Question 79 English Option 2
C
JEE Main 2019 (Online) 9th April Morning Slot Physics - Center of Mass and Collision Question 79 English Option 3
D
JEE Main 2019 (Online) 9th April Morning Slot Physics - Center of Mass and Collision Question 79 English Option 4
4
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
A capacitor with capacitance 5μF is charged to 5μC. If the plates are pulled apart to reduce the capacitance to 2μF, how much work is done ?
A
2.16 × 10–6 J
B
2.55 × 10–6 J
C
3.75 × 10–6 J
D
6.25 × 10–6 J
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