# The displacement-time $$(s\text-t)$$ graphs of two moving particles $$A~\text{and}~B$$ make angles of $$30^\circ$$ and $$45^\circ$$ with the $$x\text-$$axis as shown in the figure. The ratio of their respective velocity $$\left(\frac{v_A}{v_B}\right)$$ is:                    1. $$1: \sqrt{3}$$ 2. $$\sqrt{3}: 1$$ 3. $$1:1$$ 4.    $$1:2$$

Subtopic:  Graphs |
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NEET - 2022
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The dimensions $$[MLT^{-2}A^{-2}]$$ belong to the:
1. electric permittivity
2. magnetic flux
3. self-inductance
4. magnetic permeability
Subtopic:  Dimensions |
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The peak voltage of the AC source is equal to:

 1 $$1 / \sqrt{2}$$ times the rms value of the AC source 2 the value of voltage supplied to the circuit 3 the rms value of the AC source 4 $$\sqrt{2}$$ times the rms value of the AC source
Subtopic:  RMS & Average Values |
76%
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NEET - 2022
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The ratio of the distances travelled by a freely falling body in the $$1$$st, $$2$$nd, $$3$$rd and $$4$$th second is:
1. $$1:1:1:1$$
2. $$1:2:3:4$$
3. $$1:4:9:16$$
4. $$1:3:5:7$$
Subtopic:  Uniformly Accelerated Motion |
80%
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A body of mass $$60~ \text{g}$$  experiences a gravitational force of $$3.0~\text{N}$$ when placed at a particular point. The magnitude of the gravitational field intensity at that point is:
 1 $$180 ~\text{N/kg}$$ 2 $$0.05 ~\text{N/kg}$$ 3 $$50 ~\text{N/kg}$$ 4 $$20 ~\text{N/kg}$$
Subtopic:  Gravitational Field |
70%
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In the given nuclear reaction, the element $$\mathrm{X}$$ is:

$${ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu$$
1. $${ }_{12}^{22} \mathrm{Mg}$$
2. $${ }_{11}^{23} \mathrm{Na}$$
3. $${ }_{10}^{23} \mathrm{Ne}$$
4. $$_{10}^{22}\textrm{Ne}$$
Subtopic:  Types of Decay |
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If a soap bubble expands, the pressure inside the bubble:
 1 is equal to the atmospheric pressure 2 decreases 3 increases 4 remains the same
Subtopic:  Surface Tension |
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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 $$100$$ $$\Omega$$ resistor to that in $$200$$ $$\Omega$$ resistor in a given time is:
1. $$4:1$$
2. $$1:2$$
3. $$2:1$$
4. $$1:4$$
Subtopic:  Heating Effects of Current |
68%
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Two hollow conducting spheres of radii $$R_1$$ and $$R_2$$ $$\left ( R_1\gg R_2 \right )$$ have equal charges. The potential would be:

 1 dependent on the material property of the sphere 2 more on bigger sphere 3 more on smaller sphere 4 equal on both the spheres
Subtopic:  Electric Potential |
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The angular speed of a flywheel moving with uniform angular acceleration changes from $$1200$$ rpm to $$3120$$ rpm in $$16$$ s. The angular acceleration in rad/s² is:
1. $$104 \pi$$
2. $$2\pi$$
3. $$4\pi$$
4. $$12\pi$$
Subtopic:  Rotational Motion: Kinematics |
74%
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