JEE Main 2023 · 12 Apr 2023 Shift 1

Two satellites A and B move round the earth in the same orbit. The mass of A is twice the mass of B. The quantity which is same for the two satellites will be

1. ASpeed
2. BKinetic energy
3. CPotential energy
4. DTotal energy

Given below are two statements: Statement I : A truck and a car moving with same kinetic energy are brought to rest by applying breaks which provide equal retarding forces. Both come to rest in equal distance. Statement II : A car moving towards east takes a turn and moves towards north, the speed remains unchanged. The acceleration of the car is zero. In the light of given statements, choose the most appropriate answer from the options given below

1. ABoth Statement I and Statement II are correct.
2. BBoth Statement I and Statement II are incorrect.
3. CStatement I is correct but Statement II is incorrect.
4. DStatement I is incorrect but Statement II is correct.

The amplitude of 15 sin (1000 πt) is modulated by 10 sin (4 πt) signal. The amplitude modulated signal contains frequencies of

1. A500 Hz
2. B2 Hz
3. C250 Hz
4. D498 Hz
5. E502 Hz Choose the correct answer from the options given below:

Given below are two statements: Statement I : When the frequency of an a.c source in a series LCR circuit increases, the current in the circuit first increases, attains a maximum value and then decreases. Statement II : In a series LCR circuit, the value of power factor at resonance is one. In the light of given statements, choose the most appropriate answer from the options given below.

1. ABoth Statement I and Statement II are true.
2. BBoth Statement I and Statement II are False.
3. CStatement I is correct but Statement II is false.
4. DStatement I is incorrect but Statement II is true.

The ratio of escape velocity of a planet to the escape velocity of earth will be:- Given: Mass of the planet is 16 times mass of earth and radius of the planet is 4 times the radius of earth.

1. A2:1
2. B1:√2
3. C4:1
4. D1:4

A body cools from 80°C to 60°C in 5 minutes. The temperature of the surrounding is 20°C. The time it takes to cool from 60°C to 40°C is:

1. A25/3 s
2. B500 s
3. C450 s
4. D420 s

An engine operating between the boiling and freezing points of water will have

1. Aefficiency more than 27%.
2. Befficiency less than the efficiency of a Carnot engine operating between the same two temperatures.
3. Cefficiency equal to 27%
4. Defficiency less than 27% Choose the correct answer from the options given below:

If the r. m. s speed of chlorine molecule is 490 m/s at 27°C, the r. m. s speed of argon molecules at the same temperature will be (Atomic mass of argon = 39.9 u, molecular mass of chlorine = 70.9 u)

1. A451.7 m/s
2. B551.7 m/s
3. C651.7 m/s
4. D751.7 m/s