The variation of susceptibility $$(\chi)$$ with absolute temperature $$(T)$$ for a paramagnetic material is represented as: 1. 2. 3. 4.

Subtopic:  Curie's Law and Hysteresis (OLD NCERT) |
52%
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NEET - 2023
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The escape velocity of a body on the earth's surface is $$11.2$$ km/s. If the same body is projected upward with a velocity $$22.4$$ km/s, the velocity of this body at infinite distance from the center of the earth will be:
1. $$11.2\sqrt2$$ km/s
2. zero
3. $$11.2$$ km/s
4. $$11.2\sqrt3$$ km/s
Subtopic:  Escape velocity |
From NCERT
NEET - 2023
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A bullet of mass $$m$$ hits a block of mass $$M$$ elastically. The transfer of energy is the maximum, when:
1. $$M=m$$
2. $$M=2m$$
3. $$M<<m$$
4. $$M>>m$$
Subtopic:  Collisions |
54%
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NEET - 2023
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The ground state energy of hydrogen atom is $$-13.6~\mathrm{eV}$$. The energy needed to ionize hydrogen atom from its second excited state will be:

 1 $$13.6~\mathrm{eV}$$ 2 $$6.8~\mathrm{eV}$$ 3 $$1.51~\mathrm{eV}$$ 4 $$3.4~\mathrm{eV}$$
Subtopic:  Bohr's Model of Atom |
55%
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NEET - 2023
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A lens is made up of $$3$$ different transparent media as shown in the figure. A point object $$O$$ is placed on its axis beyond $$2f$$. How many real images will be obtained on the other side?

 1 $$2$$ 2 $$1$$ 3 No image will be formed 4 $$3$$
Subtopic:  Lenses |
59%
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NEET - 2023
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The diameter of a spherical bob, when measured with vernier callipers yielded the values: $$3.33$$ cm, $$3.32$$ cm, $$3.34$$ cm, $$3.33$$ cm and $$3.32$$ cm. The mean diameter to appropriate significant figures is:
1. $$3.328$$ cm
2. $$3.3$$ cm
3. $$3.33$$ cm
4. $$3.32$$ cm

Subtopic:  Measurement & Measuring Devices |
55%
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NEET - 2023
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On the basis of electrical conductivity, which one of the following material has the smallest resistivity?
1. Germanium
2. Silver
3. Glass
4. Silicon
Subtopic:  Derivation of Ohm's Law |
62%
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The mechanical quantity, which has dimensions of reciprocal of mass $$(M^{-1}),$$ is:
 1 angular momentum 2 coefficient of thermal conductivity 3 torque 4 gravitational constant
Subtopic:  Dimensions |
55%
From NCERT
NEET - 2023
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For the given cycle, the work done during the isobaric process is:

1. $$200$$ J
2. zero
3. $$400$$ J
4. $$600$$
Subtopic:  Work Done by a Gas |
52%
From NCERT
NEET - 2023
An AC source is connected to the given circuit. The value of $$\phi$$ will be:
 1 $$60^\circ$$ 2 $$90^\circ$$ 3 $$30^\circ$$ 4 $$45^\circ$$