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Diwali rocket is ejecting 50 g of gases per second at a velocity of 400 ms^-1. The accelerating force on the rocket will be

1) 22 dyne 2) 20 N 3) 20 dyne 4) 100 N Answer: 2) 20 N Solution: The acceleration force on... View Article

A shell at rest at the origin explodes into three fragments of masses 1 kg, 2 kg and kg. The 1 kg and 2 kg pieces fly off with speeds of 5 ms^-1 along the x-axis and 6 ms^-1 along the y-axis respectively. If the m kg piece flies off with a speed of 6.5 ms^-1, the total mass of the shell must be

1) 4 kg 2) 5 kg 3) 3.5 kg 4) 4.5 kg 5) 5.5 kg Answer: 2) 5 kg Solution: Let... View Article

A train is moving with a velocity of 20 m/s on this dust is falling at the rate of 50 kg/min. The extra force required to move this train with a constant velocity will be

1) 16.66 N 2) 1200 N 3) 1000 N 4) 166.6 N Answer: 1) 16.66 N Solution Force, F = v... View Article

If the resultant of all the external forces acting on a system of particles is zero, then from an inertial frame, one can surely say that

1) linear momentum of the system does not change in time 2) kinetic energy of the system does not change... View Article

A player kicks a football of mass 0.5 kg and the football begins to move with a velocity of 10 m/s. If the contact between the leg and the football lasts for 1/50 s, then the force acted on the ball should be

1) 2500 N 2) 1250 N 3) 250 N 4) 625 N Answer: 3) 250 N Solution: Force = Change in... View Article

A truck is moving on a frictionless surface with a uniform velocity of 10 ms^-1. A leak occurs in the water tank of the truck at the rate of 2 kgs^-1. What is the speed of the truck after 50 s, if the mass of the truck is 100 kg and the mass of water in the truck initially was 100 kg?

1) 20 m/s 2) 10 m/s 3) 15 m/s 4) None of these Answer: 1) 20 m/s Solution: Mass of the... View Article

Assume an ideal gas is taken from the state from A to state B. The process is isothermal. Then the corresponding P-T graph will be

Solution: Answer: (c) As T = constant, so P ∝ 1/V

Two wires of equal length with diameter 2 mm each having resistivity ρ₁ = 12 μΩ. cm and ρ₂ = 51 μΩ. cm respectively. They are connected in parallel so that their equivalent resistance is 3 Ω. Find the length of the wire.

a. 50 m b. 97 m c. 197 m d. 291 m Solution: Answer: b

Two travelling waves produce a standing wave represented by equation y = 1.0mm cos(1.57cm⁻¹ x) sin(78.5s⁻¹) t, the node closest to the origin in the region x > 0 will be at x = _____cm.

Solution: Answer: 1 cm At node y = 0 ⇒ 1 cos(1.57 x) sin (178.5)t = 0 ⇒ cos (1.57... View Article

An amplitude modulated wave is represented by, C_m= 10(1 + 0.2sin12560t)sin(1.11 × 10⁴t) V the modulating frequency in kHz will be

Solution: Answer: 2 kHz As we know that, \(\begin{array}{l}C_{m}= A_{c}\left [1+\frac{A_{m}}{A_{c}}sin2\pi f_{m}t \right ]\end{array} \) ⇒ 2πfm = 12560 fm... View Article

Find the moment of inertia for a badminton racket about an axis passing through ‘A’ and perpendicular to the plane as shown in the figure. Mass of the circular portion is M and that of the straight is

a. \(\begin{array}{l}\frac{173Mr^{2}}{4}+\frac{37mr^{2}}{4}\end{array} \) b. \(\begin{array}{l}-\frac{173Mr^{2}}{4}+\frac{37mr^{2}}{4}\end{array} \) c. \(\begin{array}{l}\frac{173mr^{2}}{4}+\frac{37Mr^{2}}{4}\end{array} \) d. \(\begin{array}{l}-\frac{173mr^{2}}{4}+\frac{37Mr^{2}}{4}\end{array} \) Solution: Answer: (a)

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Latest Posts

Diwali rocket is ejecting 50 g of gases per second at a velocity of 400 ms^-1. The accelerating force on the rocket will be

A shell at rest at the origin explodes into three fragments of masses 1 kg, 2 kg and kg. The 1 kg and 2 kg pieces fly off with speeds of 5 ms^-1 along the x-axis and 6 ms^-1 along the y-axis respectively. If the m kg piece flies off with a speed of 6.5 ms^-1, the total mass of the shell must be

A train is moving with a velocity of 20 m/s on this dust is falling at the rate of 50 kg/min. The extra force required to move this train with a constant velocity will be

If the resultant of all the external forces acting on a system of particles is zero, then from an inertial frame, one can surely say that

A player kicks a football of mass 0.5 kg and the football begins to move with a velocity of 10 m/s. If the contact between the leg and the football lasts for 1/50 s, then the force acted on the ball should be

A truck is moving on a frictionless surface with a uniform velocity of 10 ms^-1. A leak occurs in the water tank of the truck at the rate of 2 kgs^-1. What is the speed of the truck after 50 s, if the mass of the truck is 100 kg and the mass of water in the truck initially was 100 kg?

Assume an ideal gas is taken from the state from A to state B. The process is isothermal. Then the corresponding P-T graph will be

Two wires of equal length with diameter 2 mm each having resistivity ρ₁ = 12 μΩ. cm and ρ₂ = 51 μΩ. cm respectively. They are connected in parallel so that their equivalent resistance is 3 Ω. Find the length of the wire.

Two travelling waves produce a standing wave represented by equation y = 1.0mm cos(1.57cm⁻¹ x) sin(78.5s⁻¹) t, the node closest to the origin in the region x > 0 will be at x = _____cm.

An amplitude modulated wave is represented by, C_m= 10(1 + 0.2sin12560t)sin(1.11 × 10⁴t) V the modulating frequency in kHz will be

Find the moment of inertia for a badminton racket about an axis passing through ‘A’ and perpendicular to the plane as shown in the figure. Mass of the circular portion is M and that of the straight is

Which of the following compounds are metamers?

Product (P) is – Chemistry Problem

What is the major use of dihydrogen (H₂)?

Choose the correct structure of paracetamol.

In an octahedral complex of Fe²⁺ in a high spin state, what is the magnetic moment (spin only)?

Which among the following statements about enzymes is not correct?

Identify the process in the given reactions

What is added with HNO_3 in the Carius method?

Cu²⁺ salts react with KI and form